Notes on Chapter 1 Variables and String

Size: px
Start display at page:

Download "Notes on Chapter 1 Variables and String"

Transcription

1 Notes on Chapter 1 Variables and String Note 0: There are two things in Python; variables which can hold data and the data itself. The data itself consists of different kinds of data. These include numbers, strings, and special kinds of data such as Boolean values. Note 1: Variable Names. A variable name is some name you select to hold data. You should choose a variable name that meets the following criteria: Describe what you are putting into the variable. For example Sales, or FirstName, etc Should not be a reserve word already being used by Python such as if or while Should not be too short or too long. Cannot contain spaces or other special symbols and can only consist of letters and numbers Is case sensitive. For example, Sales and sales are different variables. Note 2: Be consistent when choosing Variable names and name spellings. Don t mix lowercase and capital letters and try and use the same capitalization pattern throughout. Note 3: Variables can appear on the left and right side of an equal sign. The equal sign is used to take what is on the right side of the equal and put it into the left side. The = symbol tells Python to assign what is on the left side of = and put it into whatever is on the right side of the = symbol. Sales = FirstName = Frank Data cannot be placed on the left side of an = symbol because data cannot store anything. The following does not make any sense = 10 Joe = Mary Note 4: When you use a variable on the left side of an equal and it is being assigned data, whatever is already inside the variable is over-written and removed. Sales = 100 Sales = 50 After the second command, the contents of Sales is 50. The original value of 100 is gone.

2 Note 5: One of the kinds of data in Python are Strings. A String is enclosed in single or double quote marks, which indicates that it is a String. For example, enclosing a number in single or double quotes makes the number into a String. Sales = 100 Sales2 = 100 Note 6: Strings can be assigned to variables just like numbers. You can use either double or single quote marks. FirstName = Jane LastName = Williams Note 7: You can mix single and double quotation marks when declaring a String. However, make sure they match within the String Message = Frank said Hello to Joe Message = Frank said Hello to Joe Note 8: If you don t want to mix quotes you can use the \ symbol before the quote to cause the quote to be printed. That is, the following will result in an error. Message = Frank said Hello to Joe Because python tries to match the first two quotes and make a string and the last two quotes and make a string. You need to rewrite this as: Message = Frank said \ Hello\ to Joe Note 9: There is a function in python that prints to the screen. This function is print( ) where the things you want to display on the screen are put between the ( ) symbols. Message = Hello Sales = 123 print( Message ) print( Sales ) print( Hello from me ) Notice that the contents of variables will be printed along with a String placed between the ( ) symbols.

3 Note 10: Python automatically breaks apart each letter in a string. You can reference each letter by using the String variable name or the String followed by a pair of [ ] symbols and an index number indicating which letter to get. Message = Hello x = Message[1] print(x) This prints the letter e. Notice that the index numbers go from left to right starting with zero. If you try to use an index value less than zero or greater than the number of letters in the String you will see an error. Note 11: You can also directly use the String to get a letter: x = Hello [2] print(x) which prints l Note 12: A Function is a block of code that has a name and that can be passed information and that can return information. You can think of a Function as a black box that has some internal structure. You can put stuff into this box, run the function, and get stuff back. You don t have to know how the box mechanism works, only what it wants and what it gives back. Note 13: Functions are written with the format: x = function_name( item1, item2, item3) Where X will hold what the function returns and each piece of data the function requires is placed between the ( ) symbols and separated by commas. With some functions that don t return anything you can leave off the x =

4 Note 14: Some useful functions in Python are the print() function, the len() function, and the str() function. The print() function prints out to the console anything between the () symbols. The len() function, when given a string, returns the number of letters in the string. The str() function takes a number and makes it into a string. print( a string ) x = 10 print( x ) y = len( Hello ) y is 5 s = Frank Jones y = len(s) y is 11 (the space is part of the string) n = 12 s = str(12) s contains 12 Note 15: In Python, strings and string variables are actually more complex than just containers for text. Strings actually contain an inner structure that includes some Functions/Methods. These functions/methods can only be accessed by reference to the string or string variable. These include the upper() and lower() functions/methods. These will return an upper case or lower case version of the string itself. name = Frank x = name.lower() y = name.upper() print(x) this prints frank print(y) this prints FRANK print( name.lower() ) this prints frank z = Joe.upper() z contains JOE Note 16: You can combine strings together using the + symbol. This symbol is used to add numbers together but is also used to combine strings. s = Sara n = Edwards fn = s + n fn contains SaraEdwards Note 17: Combining numbers and strings requires the numbers be converted to strings using the str() function. n = 12 s = You are s2 = years old msg = s + str(n) + s2 msg contains You are 12 years old

5 Note 18: Another very useful string function is the format() function. This function, like upper() and lower(), is attached to strings and string variables. The format() function takes a set of parameters and places each parameter into the string by using {} symbols as indicators marking where the data should go. msg = You are {} years old.format(12) this prints You are 12 years old Note 19: The order that the {} symbols appear in the string should match the order the data is listed in the format() method. msg = Hello {}, you are {} years old.format( Jane, 12 ) this prints Hello Jane you are 12 years old Note 20: You can control the order by including numbers inside the {} symbols, starting with zero. The number identifies which parameter will be used: msg = Hello {1}, you are {0} years old.format(12, Jane ) this prints Hello Jane you are 12 years old Note 21: The formatting commands can also be used to force spaces and alignment. This is done by using the parameter number, a colon, and a number indicating how much space the item should take up. This is written as: { item number : output space} For example, if your formatting string contained {0:12} then the first item in the format() method would be printed with 12 spaces before the item. msg = You are {0:10} years old.format(12) This would print You are 12 years old

6 Note 22: To force the format to print spaces after the item you would use the command: {item number: <output space} or {0:<12} msg = You are {0:<10} years old.format(12) This would print You are 12 years old Note 23: By default, python prints all decimal values. val = print(val) this prints Note 24: When working with money you often want to round to two decimal values. This can be done by using the format() command. {item number: output space.decimal value f) or {0 : 8.2f } val = msg = You have {0:8.2f} dollars.format( val ) This prints You have dollars Note 25: The input() method will pause and ask the user for some data. When the user enters the data this method returns whatever the user entered. print( Enter your name ) n = input() print(n) This prints the message on one line and then, on the next blank line, pauses until the user types in a name and presses enter. To put the message on the same line you would use: n = input( Enter your name ) Note 26: Anything retrieved with the input() command comes in as a string. If you want to input a number and use it as a number you have to convert it from a string to a number. The str() method converts a number to a string while the int() and float() methods convert a string to a number. n = int( 21 ) f = float( )

Python Programming Exercises 1

Python Programming Exercises 1 Python Programming Exercises 1 Notes: throughout these exercises >>> preceeds code that should be typed directly into the Python interpreter. To get the most out of these exercises, don t just follow them

More information

Chapter Two PROGRAMMING WITH NUMBERS AND STRINGS

Chapter Two PROGRAMMING WITH NUMBERS AND STRINGS Chapter Two PROGRAMMING WITH NUMBERS AND STRINGS Introduction Numbers and character strings are important data types in any Python program These are the fundamental building blocks we use to build more

More information

Introduction to Python (All the Basic Stuff)

Introduction to Python (All the Basic Stuff) Introduction to Python (All the Basic Stuff) 1 Learning Objectives Python program development Command line, IDEs, file editing Language fundamentals Types & variables Expressions I/O Control flow Functions

More information

Ex: If you use a program to record sales, you will want to remember data:

Ex: If you use a program to record sales, you will want to remember data: Data Variables Programs need to remember values. Ex: If you use a program to record sales, you will want to remember data: A loaf of bread was sold to Sione Latu on 14/02/19 for T$1.00. Customer Name:

More information

UNIT 5. String Functions and Random Numbers

UNIT 5. String Functions and Random Numbers UNIT 5 String Functions and Random Numbers DAY 1 String data type String storage in data String indexing I can.. Explain the purpose of the string variable type and how it is stored in memory. Explain

More information

Lecture 3. Input, Output and Data Types

Lecture 3. Input, Output and Data Types Lecture 3 Input, Output and Data Types Goals for today Variable Types Integers, Floating-Point, Strings, Booleans Conversion between types Operations on types Input/Output Some ways of getting input, and

More information

Basic program The following is a basic program in C++; Basic C++ Source Code Compiler Object Code Linker (with libraries) Executable

Basic program The following is a basic program in C++; Basic C++ Source Code Compiler Object Code Linker (with libraries) Executable Basic C++ Overview C++ is a version of the older C programming language. This is a language that is used for a wide variety of applications and which has a mature base of compilers and libraries. C++ is

More information

ENGR 101 Engineering Design Workshop

ENGR 101 Engineering Design Workshop ENGR 101 Engineering Design Workshop Lecture 2: Variables, Statements/Expressions, if-else Edgardo Molina City College of New York Literals, Variables, Data Types, Statements and Expressions Python as

More information

Getting Started. Excerpted from Hello World! Computer Programming for Kids and Other Beginners

Getting Started. Excerpted from Hello World! Computer Programming for Kids and Other Beginners Getting Started Excerpted from Hello World! Computer Programming for Kids and Other Beginners EARLY ACCESS EDITION Warren D. Sande and Carter Sande MEAP Release: May 2008 Softbound print: November 2008

More information

Basics of Java Programming

Basics of Java Programming Basics of Java Programming Lecture 2 COP 3252 Summer 2017 May 16, 2017 Components of a Java Program statements - A statement is some action or sequence of actions, given as a command in code. A statement

More information

The Big Python Guide

The Big Python Guide The Big Python Guide Big Python Guide - Page 1 Contents Input, Output and Variables........ 3 Selection (if...then)......... 4 Iteration (for loops)......... 5 Iteration (while loops)........ 6 String

More information

Textbook. Topic 5: Repetition. Types of Loops. Repetition

Textbook. Topic 5: Repetition. Types of Loops. Repetition Textbook Topic 5: Repetition Are you saying that I am redundant? That I repeat myself? That I say the same thing over and over again? Strongly Recommended Exercises The Python Workbook: 64, 69, 74, and

More information

Overview. - General Data Types - Categories of Words. - Define Before Use. - The Three S s. - End of Statement - My First Program

Overview. - General Data Types - Categories of Words. - Define Before Use. - The Three S s. - End of Statement - My First Program Overview - General Data Types - Categories of Words - The Three S s - Define Before Use - End of Statement - My First Program a description of data, defining a set of valid values and operations List of

More information

CS 102 Lab 3 Fall 2012

CS 102 Lab 3 Fall 2012 Name: The symbol marks programming exercises. Upon completion, always capture a screenshot and include it in your lab report. Email lab report to instructor at the end of the lab. Review of built-in functions

More information

Chapter 2 Input, Processing and Output. Hong Sun COSC 1436 Spring 2017 Jan 30, 2017

Chapter 2 Input, Processing and Output. Hong Sun COSC 1436 Spring 2017 Jan 30, 2017 Chapter 2 Input, Processing and Output Hong Sun COSC 1436 Spring 2017 Jan 30, 2017 Designing a Program Designing a Program o Programs must be carefully designed before they are written. Before beginning

More information

NOTES: Variables & Constants (module 10)

NOTES: Variables & Constants (module 10) Computer Science 110 NAME: NOTES: Variables & Constants (module 10) Introduction to Variables A variable is like a container. Like any other container, its purpose is to temporarily hold or store something.

More information

Introduction to Bioinformatics

Introduction to Bioinformatics Introduction to Bioinformatics Variables, Data Types, Data Structures, Control Structures Janyl Jumadinova February 3, 2016 Data Type Data types are the basic unit of information storage. Instances of

More information

3 The Building Blocks: Data Types, Literals, and Variables

3 The Building Blocks: Data Types, Literals, and Variables chapter 3 The Building Blocks: Data Types, Literals, and Variables 3.1 Data Types A program can do many things, including calculations, sorting names, preparing phone lists, displaying images, validating

More information

C++ Basics. Lecture 2 COP 3014 Spring January 8, 2018

C++ Basics. Lecture 2 COP 3014 Spring January 8, 2018 C++ Basics Lecture 2 COP 3014 Spring 2018 January 8, 2018 Structure of a C++ Program Sequence of statements, typically grouped into functions. function: a subprogram. a section of a program performing

More information

Discussion 1H Notes (Week 2, 4/8) TA: Brian Choi Section Webpage:

Discussion 1H Notes (Week 2, 4/8) TA: Brian Choi Section Webpage: Discussion 1H Notes (Week 2, 4/8) TA: Brian Choi (schoi@cs.ucla.edu) Section Webpage: http://www.cs.ucla.edu/~schoi/cs31 Variables You have to instruct your computer every little thing it needs to do even

More information

VARIABLES. 1. STRINGS Data with letters and/or characters 2. INTEGERS Numbers without decimals 3. FLOATING POINT NUMBERS Numbers with decimals

VARIABLES. 1. STRINGS Data with letters and/or characters 2. INTEGERS Numbers without decimals 3. FLOATING POINT NUMBERS Numbers with decimals VARIABLES WHAT IS A VARIABLE? A variable is a storage location in the computer s memory, used for holding information while the program is running. The information that is stored in a variable may change,

More information

Mobile App:IT. Methods & Classes

Mobile App:IT. Methods & Classes Mobile App:IT Methods & Classes WHAT IS A METHOD? - A method is a set of code which is referred to by name and can be called (invoked) at any point in a program simply by utilizing the method's name. -

More information

Introduction to Java Unit 1. Using BlueJ to Write Programs

Introduction to Java Unit 1. Using BlueJ to Write Programs Introduction to Java Unit 1. Using BlueJ to Write Programs 1. Open up BlueJ. Click on the Project menu and select New Project. You should see the window on the right. Navigate to wherever you plan to save

More information

CMPT 120 Basics of Python. Summer 2012 Instructor: Hassan Khosravi

CMPT 120 Basics of Python. Summer 2012 Instructor: Hassan Khosravi CMPT 120 Basics of Python Summer 2012 Instructor: Hassan Khosravi Python A simple programming language to implement your ideas Design philosophy emphasizes code readability Implementation of Python was

More information

MITOCW watch?v=0jljzrnhwoi

MITOCW watch?v=0jljzrnhwoi MITOCW watch?v=0jljzrnhwoi The following content is provided under a Creative Commons license. Your support will help MIT OpenCourseWare continue to offer high quality educational resources for free. To

More information

printf( Please enter another number: ); scanf( %d, &num2);

printf( Please enter another number: ); scanf( %d, &num2); CIT 593 Intro to Computer Systems Lecture #13 (11/1/12) Now that we've looked at how an assembly language program runs on a computer, we're ready to move up a level and start working with more powerful

More information

Expressions and Variables

Expressions and Variables Expressions and Variables Expressions print(expression) An expression is evaluated to give a value. For example: 2 + 9-6 Evaluates to: 5 Data Types Integers 1, 2, 3, 42, 100, -5 Floating points 2.5, 7.0,

More information

Review. Input, Processing and Output. Review. Review. Designing a Program. Typical Software Development cycle. Bonita Sharif

Review. Input, Processing and Output. Review. Review. Designing a Program. Typical Software Development cycle. Bonita Sharif Input, Processing and Output Bonita Sharif 1 Review A program is a set of instructions a computer follows to perform a task The CPU is responsible for running and executing programs A set of instructions

More information

Hello World! Computer Programming for Kids and Other Beginners. Chapter 1. by Warren Sande and Carter Sande. Copyright 2009 Manning Publications

Hello World! Computer Programming for Kids and Other Beginners. Chapter 1. by Warren Sande and Carter Sande. Copyright 2009 Manning Publications Hello World! Computer Programming for Kids and Other Beginners by Warren Sande and Carter Sande Chapter 1 Copyright 2009 Manning Publications brief contents Preface xiii Acknowledgments xix About this

More information

Should you know scanf and printf?

Should you know scanf and printf? C-LANGUAGE INPUT & OUTPUT C-Language Output with printf Input with scanf and gets_s and Defensive Programming Copyright 2016 Dan McElroy Should you know scanf and printf? scanf is only useful in the C-language,

More information

Professor: Sana Odeh Lecture 3 Python 3.1 Variables, Primitive Data Types & arithmetic operators

Professor: Sana Odeh Lecture 3 Python 3.1 Variables, Primitive Data Types & arithmetic operators 1 Professor: Sana Odeh odeh@courant.nyu.edu Lecture 3 Python 3.1 Variables, Primitive Data Types & arithmetic operators Review What s wrong with this line of code? print( He said Hello ) What s wrong with

More information

1. What type of error produces incorrect results but does not prevent the program from running? a. syntax b. logic c. grammatical d.

1. What type of error produces incorrect results but does not prevent the program from running? a. syntax b. logic c. grammatical d. Gaddis: Starting Out with Python, 2e - Test Bank Chapter Two MULTIPLE CHOICE 1. What type of error produces incorrect results but does not prevent the program from running? a. syntax b. logic c. grammatical

More information

Fundamentals: Expressions and Assignment

Fundamentals: Expressions and Assignment Fundamentals: Expressions and Assignment A typical Python program is made up of one or more statements, which are executed, or run, by a Python console (also known as a shell) for their side effects e.g,

More information

Python Review IPRE

Python Review IPRE Python Review 2 Jay Summet 2005-12-31 IPRE Outline Compound Data Types: Strings, Tuples, Lists & Dictionaries Immutable types: Strings Tuples Accessing Elements Cloning Slices Mutable Types: Lists Dictionaries

More information

Variables and Constants

Variables and Constants 87 Chapter 5 Variables and Constants 5.1 Storing Information in the Computer 5.2 Declaring Variables 5.3 Inputting Character Strings 5.4 Mistakes in Programs 5.5 Inputting Numbers 5.6 Inputting Real Numbers

More information

Sequence of Characters. Non-printing Characters. And Then There Is """ """ Subset of UTF-8. String Representation 6/5/2018.

Sequence of Characters. Non-printing Characters. And Then There Is   Subset of UTF-8. String Representation 6/5/2018. Chapter 4 Working with Strings Sequence of Characters we've talked about strings being a sequence of characters. a string is indicated between ' ' or " " the exact sequence of characters is maintained

More information

SAMS Programming - Section C. Lecture 1: Introduction + Basic Building Blocks of Programming

SAMS Programming - Section C. Lecture 1: Introduction + Basic Building Blocks of Programming SAMS Programming - Section C Lecture 1: Introduction + Basic Building Blocks of Programming Anil Ada aada@cs.cmu.edu July 3, 2017 What is programming (coding)? What is computer programming? What is a computer?

More information

LESSON 2 VARIABLES, OPERATORS, EXPRESSIONS, AND USER INPUT

LESSON 2 VARIABLES, OPERATORS, EXPRESSIONS, AND USER INPUT LESSON VARIABLES, OPERATORS, EXPRESSIONS, AND USER INPUT PROF. JOHN P. BAUGH PROFJPBAUGH@GMAIL.COM PROFJPBAUGH.COM CONTENTS INTRODUCTION... Assumptions.... Variables and Data Types..... Numeric Data Types:

More information

Exercise: Inventing Language

Exercise: Inventing Language Memory Computers get their powerful flexibility from the ability to store and retrieve data Data is stored in main memory, also known as Random Access Memory (RAM) Exercise: Inventing Language Get a separate

More information

Introduction to Programming in Turing. Input, Output, and Variables

Introduction to Programming in Turing. Input, Output, and Variables Introduction to Programming in Turing Input, Output, and Variables The IPO Model The most basic model for a computer system is the Input-Processing-Output (IPO) Model. In order to interact with the computer

More information

CSC Web Programming. Introduction to JavaScript

CSC Web Programming. Introduction to JavaScript CSC 242 - Web Programming Introduction to JavaScript JavaScript JavaScript is a client-side scripting language the code is executed by the web browser JavaScript is an embedded language it relies on its

More information

Python allows variables to hold string values, just like any other type (Boolean, int, float). So, the following assignment statements are valid:

Python allows variables to hold string values, just like any other type (Boolean, int, float). So, the following assignment statements are valid: 1 STRINGS Objectives: How text data is internally represented as a string Accessing individual characters by a positive or negative index String slices Operations on strings: concatenation, comparison,

More information

06/11/2014. Subjects. CS Applied Robotics Lab Gerardo Carmona :: makeroboticsprojects.com June / ) Beginning with Python

06/11/2014. Subjects. CS Applied Robotics Lab Gerardo Carmona :: makeroboticsprojects.com June / ) Beginning with Python CS95003 - Applied Robotics Lab Gerardo Carmona :: makeroboticsprojects.com June / 2014 Subjects 1) Beginning with Python 2) Variables 3) Strings 4) Basic arithmetic operators 5) Flow control 6) Comparison

More information

Hello, World and Variables

Hello, World and Variables Hello, World and Variables Hello, World! The most basic program in any language (Python included) is often considered to be the Hello, world! statement. As it s name would suggest, the program simply returns

More information

Objectives. Chapter 2: Basic Elements of C++ Introduction. Objectives (cont d.) A C++ Program (cont d.) A C++ Program

Objectives. Chapter 2: Basic Elements of C++ Introduction. Objectives (cont d.) A C++ Program (cont d.) A C++ Program Objectives Chapter 2: Basic Elements of C++ In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates

More information

The C++ Language. Arizona State University 1

The C++ Language. Arizona State University 1 The C++ Language CSE100 Principles of Programming with C++ (based off Chapter 2 slides by Pearson) Ryan Dougherty Arizona State University http://www.public.asu.edu/~redoughe/ Arizona State University

More information

Chapter 2: Basic Elements of C++

Chapter 2: Basic Elements of C++ Chapter 2: Basic Elements of C++ Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates

More information

Spring 2017 CS 1110/1111 Exam 1

Spring 2017 CS 1110/1111 Exam 1 CS 1110/1111 Spring 2017 Exam 1 page 1 of 6 Spring 2017 CS 1110/1111 Exam 1 Bubble in your computing ID in the footer of this page. We use an optical scanner to read it, so fill in the bubbles darkly.

More information

Chapter 2: Basic Elements of C++ Objectives. Objectives (cont d.) A C++ Program. Introduction

Chapter 2: Basic Elements of C++ Objectives. Objectives (cont d.) A C++ Program. Introduction Chapter 2: Basic Elements of C++ C++ Programming: From Problem Analysis to Program Design, Fifth Edition 1 Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers

More information

Working with Strings. Husni. "The Practice of Computing Using Python", Punch & Enbody, Copyright 2013 Pearson Education, Inc.

Working with Strings. Husni. The Practice of Computing Using Python, Punch & Enbody, Copyright 2013 Pearson Education, Inc. Working with Strings Husni "The Practice of Computing Using Python", Punch & Enbody, Copyright 2013 Pearson Education, Inc. Sequence of characters We've talked about strings being a sequence of characters.

More information

MIT AITI Python Software Development

MIT AITI Python Software Development MIT AITI Python Software Development PYTHON L02: In this lab we practice all that we have learned on variables (lack of types), naming conventions, numeric types and coercion, strings, booleans, operator

More information

Level 3 Computing Year 2 Lecturer: Phil Smith

Level 3 Computing Year 2 Lecturer: Phil Smith Level 3 Computing Year 2 Lecturer: Phil Smith Previously We learnt what a computer program does. What a procedural program does. What a procedure is. We had a first look at IDLE. Now Learning Outcomes

More information

age = 23 age = age + 1 data types Integers Floating-point numbers Strings Booleans loosely typed age = In my 20s

age = 23 age = age + 1 data types Integers Floating-point numbers Strings Booleans loosely typed age = In my 20s Intro to Python Python Getting increasingly more common Designed to have intuitive and lightweight syntax In this class, we will be using Python 3.x Python 2.x is still very popular, and the differences

More information

Python Intro GIS Week 1. Jake K. Carr

Python Intro GIS Week 1. Jake K. Carr GIS 5222 Week 1 Why Python It s simple and easy to learn It s free - open source! It s cross platform IT S expandable!! Why Python: Example Consider having to convert 1,000 shapefiles into feature classes

More information

Hello, World! An Easy Intro to Python & Programming. Jack Rosenthal

Hello, World! An Easy Intro to Python & Programming. Jack Rosenthal An Easy Intro to Python & Programming Don t just buy a new video game, make one. Don t just download the latest app, help design it. Don t just play on your phone, program it. No one is born a computer

More information

Writing a Basic Program in Python

Writing a Basic Program in Python Writing a Basic Program in Python Introduction When someone wants to learn how to program a computer they could be seeking a number of different things. Someone way want to learn a particular programming

More information

LECTURE 02 INTRODUCTION TO C++

LECTURE 02 INTRODUCTION TO C++ PowerPoint Slides adapted from *Starting Out with C++: From Control Structures through Objects, 7/E* by *Tony Gaddis* Copyright 2012 Pearson Education Inc. COMPUTER PROGRAMMING LECTURE 02 INTRODUCTION

More information

LOOPS. Repetition using the while statement

LOOPS. Repetition using the while statement 1 LOOPS Loops are an extremely useful feature in any programming language. They allow you to direct the computer to execute certain statements more than once. In Python, there are two kinds of loops: while

More information

Variables and. What Really Happens When You Run hello_world.py

Variables and. What Really Happens When You Run hello_world.py 2 Variables and Simple Data Types In this chapter you ll learn about the different kinds of data you can work with in your Python programs. You ll also learn how to use variables to represent data in your

More information

Chapter 1 - What s in a program?

Chapter 1 - What s in a program? Chapter 1 - What s in a program? I. Student Learning Outcomes (SLOs) a. You should be able to use Input-Process-Output charts to define basic processes in a programming module. b. You should be able to

More information

MICROPROCESSOR SYSTEMS INTRODUCTION TO PYTHON

MICROPROCESSOR SYSTEMS INTRODUCTION TO PYTHON MICROPROCESSOR SYSTEMS INTRODUCTION TO PYTHON Table of contents 2 1. Learning Outcomes 2. Introduction 3. The first program: hello world! 4. The second program: hello (your name)! 5. More data types 6.

More information

Chapter 2: Programming Concepts

Chapter 2: Programming Concepts Chapter 2: Programming Concepts Objectives Students should Know the steps required to create programs using a programming language and related terminology. Be familiar with the basic structure of a Java

More information

Strings. Upsorn Praphamontripong. Note: for reference when we practice loop. We ll discuss Strings in detail after Spring break

Strings. Upsorn Praphamontripong. Note: for reference when we practice loop. We ll discuss Strings in detail after Spring break Note: for reference when we practice loop. We ll discuss Strings in detail after Spring break Strings Upsorn Praphamontripong CS 1111 Introduction to Programming Spring 2018 Strings Sequence of characters

More information

Python: common syntax

Python: common syntax Lab 09 Python! Python Intro Main Differences from C++: True and False are capitals Python floors (always down) with int division (matters with negatives): -3 / 2 = -2 No variable data types or variable

More information

3. Except for strings, double quotes, identifiers, and keywords, C++ ignores all white space.

3. Except for strings, double quotes, identifiers, and keywords, C++ ignores all white space. Chapter 2: Problem Solving Using C++ TRUE/FALSE 1. Modular programs are easier to develop, correct, and modify than programs constructed in some other manner. ANS: T PTS: 1 REF: 45 2. One important requirement

More information

Programming with Java

Programming with Java Programming with Java Variables and Output Statement Lecture 03 First stage Software Engineering Dep. Saman M. Omer 2017-2018 Objectives ü Declare and assign values to variable ü How to use eclipse ü What

More information

Objectives. In this chapter, you will:

Objectives. In this chapter, you will: Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates arithmetic expressions Learn about

More information

CMSC 201 Computer Science I for Majors

CMSC 201 Computer Science I for Majors CMSC 201 Computer Science I for Majors Lecture 02 Intro to Python Syllabus Last Class We Covered Grading scheme Academic Integrity Policy (Collaboration Policy) Getting Help Office hours Programming Mindset

More information

Chapter 1 Summary. Chapter 2 Summary. end of a string, in which case the string can span multiple lines.

Chapter 1 Summary. Chapter 2 Summary. end of a string, in which case the string can span multiple lines. Chapter 1 Summary Comments are indicated by a hash sign # (also known as the pound or number sign). Text to the right of the hash sign is ignored. (But, hash loses its special meaning if it is part of

More information

CS 115 Lecture 4. More Python; testing software. Neil Moore

CS 115 Lecture 4. More Python; testing software. Neil Moore CS 115 Lecture 4 More Python; testing software Neil Moore Department of Computer Science University of Kentucky Lexington, Kentucky 40506 neil@cs.uky.edu 8 September 2015 Syntax: Statements A statement

More information

Visualize ComplexCities

Visualize ComplexCities Introduction to Python Chair of Information Architecture ETH Zürich February 22, 2013 First Steps Python Basics Conditionals Statements Loops User Input Functions Programming? Programming is the interaction

More information

BASIC ELEMENTS OF A COMPUTER PROGRAM

BASIC ELEMENTS OF A COMPUTER PROGRAM BASIC ELEMENTS OF A COMPUTER PROGRAM CSC128 FUNDAMENTALS OF COMPUTER PROBLEM SOLVING LOGO Contents 1 Identifier 2 3 Rules for naming and declaring data variables Basic data types 4 Arithmetic operators

More information

Fundamentals of Programming. Lecture 1: Introduction + Basic Building Blocks of Programming

Fundamentals of Programming. Lecture 1: Introduction + Basic Building Blocks of Programming 15-112 Fundamentals of Programming Lecture 1: Introduction + Basic Building Blocks of Programming Anil Ada aada@cs.cmu.edu May 16, 2016 What is programming (coding)? What is computer programming? What

More information

Python Day 3 11/28/16

Python Day 3 11/28/16 Python Day 3 11/28/16 Objectives Review Concepts Types of Errors Escape sequences String functions Find the Errors bookcost = int(input("how much is the book: ")) discount = float(input("what is the discount:

More information

Introduction to Computer Programming CSCI-UA 2. Review Midterm Exam 1

Introduction to Computer Programming CSCI-UA 2. Review Midterm Exam 1 Review Midterm Exam 1 Review Midterm Exam 1 Exam on Monday, October 7 Data Types and Variables = Data Types and Variables Basic Data Types Integers Floating Point Numbers Strings Data Types and Variables

More information

Not-So-Mini-Lecture 6. Modules & Scripts

Not-So-Mini-Lecture 6. Modules & Scripts Not-So-Mini-Lecture 6 Modules & Scripts Interactive Shell vs. Modules Launch in command line Type each line separately Python executes as you type Write in a code editor We use Atom Editor But anything

More information

Full file at

Full file at Java Programming: From Problem Analysis to Program Design, 3 rd Edition 2-1 Chapter 2 Basic Elements of Java At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class

More information

Introduction to Python Code Quality

Introduction to Python Code Quality Introduction to Python Code Quality Clarity and readability are important (easter egg: type import this at the Python prompt), as well as extensibility, meaning code that can be easily enhanced and extended.

More information

Variables, expressions and statements

Variables, expressions and statements Variables, expressions and statements 2.1. Values and data types A value is one of the fundamental things like a letter or a number that a program manipulates. The values we have seen so far are 2 (the

More information

Maxime Defauw. Learning Swift

Maxime Defauw. Learning Swift Maxime Defauw Learning Swift SAMPLE CHAPTERS 1 Introduction Begin at the beginning, the King said, very gravely, and go on till you come to the end: then stop. Lewis Carroll, Alice in Wonderland Hi and

More information

DEPARTMENT OF MATHS, MJ COLLEGE

DEPARTMENT OF MATHS, MJ COLLEGE T. Y. B.Sc. Mathematics MTH- 356 (A) : Programming in C Unit 1 : Basic Concepts Syllabus : Introduction, Character set, C token, Keywords, Constants, Variables, Data types, Symbolic constants, Over flow,

More information

PYTHON. Values and Variables

PYTHON. Values and Variables December 13 2017 Naveen Sagayaselvaraj PYTHON Values and Variables Overview Integer Values Variables and Assignment Identifiers Floating-point Types User Input The eval Function Controlling the print Function

More information

CSC 108H: Introduction to Computer Programming. Summer Marek Janicki

CSC 108H: Introduction to Computer Programming. Summer Marek Janicki CSC 108H: Introduction to Computer Programming Summer 2011 Marek Janicki Administration Questions on the assignment at the end. There were some questions about the memory model from last week. Accordingly,

More information

Date: The date includes the month, day, and year. The month is spelled out. Skip 4 spaces, and type the recipient s address.

Date: The date includes the month, day, and year. The month is spelled out. Skip 4 spaces, and type the recipient s address. What is a cover letter: A cover letter is a letter which is sent with an application for a school or for a job. It tells who you are and what position you want. The format of a cover letter: A cover letter

More information

AP Computer Science Unit 1. Writing Programs Using BlueJ

AP Computer Science Unit 1. Writing Programs Using BlueJ AP Computer Science Unit 1. Writing Programs Using BlueJ 1. Open up BlueJ. Click on the Project menu and select New Project. You should see the window on the right. Navigate to wherever you plan to save

More information

Key Differences Between Python and Java

Key Differences Between Python and Java Python Python supports many (but not all) aspects of object-oriented programming; but it is possible to write a Python program without making any use of OO concepts. Python is designed to be used interpretively.

More information

IDM 232. Scripting for Interactive Digital Media II. IDM 232: Scripting for IDM II 1

IDM 232. Scripting for Interactive Digital Media II. IDM 232: Scripting for IDM II 1 IDM 232 Scripting for Interactive Digital Media II IDM 232: Scripting for IDM II 1 PHP HTML-embedded scripting language IDM 232: Scripting for IDM II 2 Before we dive into code, it's important to understand

More information

Invent Your Own Computer Games with Python

Invent Your Own Computer Games with Python Hello Wor ld! Invent Your Own Computer Games with Python Taesoo Kwon Heejin Park Hanyang University Introduction to Python Python Easier to learn than C. Serious programming language. Many expert programmers

More information

DOWNLOAD PDF MICROSOFT EXCEL ALL FORMULAS LIST WITH EXAMPLES

DOWNLOAD PDF MICROSOFT EXCEL ALL FORMULAS LIST WITH EXAMPLES Chapter 1 : Examples of commonly used formulas - Office Support A collection of useful Excel formulas for sums and counts, dates and times, text manipularion, conditional formatting, percentages, Excel

More information

CMSC 201 Spring 2016 Lab 04 For Loops

CMSC 201 Spring 2016 Lab 04 For Loops CMSC 201 Spring 2016 Lab 04 For Loops Assignment: Lab 04 For Loops Due Date: During discussion, February 29 th through March 3 rd Value: 10 points Part 1: Lists Lists are an easy way to hold lots of individual

More information

Lecture 05 I/O statements Printf, Scanf Simple statements, Compound statements

Lecture 05 I/O statements Printf, Scanf Simple statements, Compound statements Programming, Data Structures and Algorithms Prof. Shankar Balachandran Department of Computer Science and Engineering Indian Institute of Technology, Madras Lecture 05 I/O statements Printf, Scanf Simple

More information

Program Fundamentals

Program Fundamentals Program Fundamentals /* HelloWorld.java * The classic Hello, world! program */ class HelloWorld { public static void main (String[ ] args) { System.out.println( Hello, world! ); } } /* HelloWorld.java

More information

\n is used in a string to indicate the newline character. An expression produces data. The simplest expression

\n is used in a string to indicate the newline character. An expression produces data. The simplest expression Chapter 1 Summary Comments are indicated by a hash sign # (also known as the pound or number sign). Text to the right of the hash sign is ignored. (But, hash loses its special meaning if it is part of

More information

Introduction to Java & Fundamental Data Types

Introduction to Java & Fundamental Data Types Introduction to Java & Fundamental Data Types LECTURER: ATHENA TOUMBOURI How to Create a New Java Project in Eclipse Eclipse is one of the most popular development environments for Java, as it contains

More information

Fundamentals of Programming CS-110. Lecture 2

Fundamentals of Programming CS-110. Lecture 2 Fundamentals of Programming CS-110 Lecture 2 Last Lab // Example program #include using namespace std; int main() { cout

More information

COSC 123 Computer Creativity. Introduction to Java. Dr. Ramon Lawrence University of British Columbia Okanagan

COSC 123 Computer Creativity. Introduction to Java. Dr. Ramon Lawrence University of British Columbia Okanagan COSC 123 Computer Creativity Introduction to Java Dr. Ramon Lawrence University of British Columbia Okanagan ramon.lawrence@ubc.ca Key Points 1) Introduce Java, a general-purpose programming language,

More information

CS 112: Intro to Comp Prog

CS 112: Intro to Comp Prog CS 112: Intro to Comp Prog Lecture Review Data Types String Operations Arithmetic Operators Variables In-Class Exercises Lab Assignment #2 Upcoming Lecture Topics Variables * Types Functions Purpose Parameters

More information

C++ Programming: From Problem Analysis to Program Design, Third Edition

C++ Programming: From Problem Analysis to Program Design, Third Edition C++ Programming: From Problem Analysis to Program Design, Third Edition Chapter 2: Basic Elements of C++ Objectives (continued) Become familiar with the use of increment and decrement operators Examine

More information

Introduction. For instance, if we need to store three whole numbers we can create two integer (int) variables called N1, N2 and tot. tot.

Introduction. For instance, if we need to store three whole numbers we can create two integer (int) variables called N1, N2 and tot. tot. Variables (03) Variables and their data types. Introduction In most cases, whilst a program is running, it requires memory storage for calculations or text manipulation. Most of the time, the RAM (random

More information

Introduction to Computation for the Humanities and Social Sciences. CS 3 Chris Tanner

Introduction to Computation for the Humanities and Social Sciences. CS 3 Chris Tanner Introduction to Computation for the Humanities and Social Sciences CS 3 Chris Tanner Lecture 4 Python: Variables, Operators, and Casting Lecture 4 [People] need to learn code, man I m sick with the Python.

More information