# Variables, Constants, and Data Types

Size: px
Start display at page:

Transcription

1 Variables, Constants, and Data Types Strings and Escape Characters Primitive Data Types Variables, Initialization, and Assignment Constants Reading for this lecture: Dawson, Chapter 2

2 Character Strings So far, all of our program data has been text in string form. A string is, quite literally, a string of characters Test can be represented as a string literal by bounding it with a pair of double quotes OR a pair of single quotes. (Must match!) Examples: "This is a string literal." 'X' '123 Main Street' "" (empty string) The word "literal" indicates that we are directly coding the information rather that getting it indirectly.

3 Combining Strings To combine (or "concatenate") two strings, we can use the plus sign "Peanut butter " + "and jelly" You may find this helpful when printing output where some parts of the text may vary while other parts remain the same. Consider this example: name = "Bob" print ("Hello, " + name + "...welcome!") Prints: Hello, Bob...welcome!

4 String Concatenation The + operator is also used for arithmetic addition The function that it performs depends on the type of the information on which it operates If both operands are strings, it performs string concatenation If both operands are numeric, it adds them "Hello " + "world" gives you "Hello world" gives you 46 NOTE: You cannot directly concatenate a string and a number:

5 String Concatenation However, it will work if you first convert the number to its string equivalent: print ("My favorite number is " + str(7)) My favorite number is 7 This has to do with the behavior of different data types in Python. Other programming languages create different restrictions and allowances based on how their data types are set up

6 Escape Sequences What if we want to include the quote character itself? The following line would confuse the interpreter because it would interpret the two pairs of quotes as two strings and the text between the strings as a syntax error: print ("I said "Hello" to you.") A String Syntax Error A String One option would be to replace the beginning and ending double-quote symbols with single-quotes: print ('I said "Hello" to you.') The reverse would also be valid print ("I said 'Hello' to you.")

7 Escape Sequences Another option is to use escape sequences, which are character combinations that have a special meaning within a string Some Escape Sequences: Escape Sequence Meaning Example: print ("Hello,\n\tworld") Hello, world \t \n \r \" \' \\ tab newline carriage return double quote single quote backslash

8 Useful string methods Using a string method requires three things: 1) A reference to the string, such as a string literal or a variable 2) The method name, such as upper 3) The argument list, a pair of parentheses () with a list of values inside. May be empty Example: print ("Hello") Hello print ("Hello".upper()) HELLO print ("Hello".lower()) hello See Table 2.3 on page 38 of the textbook for more methods you can use

9 Number Bases You are probably used to numbers in base-10, where each digit is a 0-9 (10 possible values) The base specifies how many values can be expressed using a particular number of digits. For example, 3 base-10 digits can express 1000 different values: In other words, the base raised to the power the number of digits Example:10^3 = 1000

10 Number Bases In addition to base-10, you will also see other types, such as the following: Binary: base-2, every digit is a 0 or 1 Octal: base-8, every digit is a 0-7 Hexadecimal: base-16, every digit is a 0-15; digits become a-f I recommend researching this topic to become more familiar In programming, you will encounter binary very frequently because that is how data is stored

11 Number Bases Binary You are probably familiar with "bytes" as a unit of computer storage A byte is made of 8 bits, where each bit is a 0 or 1 in other words, binary You have progressively larger forms of storage: bits bytes kilobytes megabytes gigabytes TERABYTES!!!

12 Types of Data In Python, all data are objects You will work mainly with two types of data: Built-in data types: These include most basic forms of data you will see in your programs Complex data types (my wording): Conglomerations of other data types, both built-in and other complex types We will introduce types as needed

13 Some Primitive Types We call these "primitive" because they form the basis for other more complex data types Three numeric types: int float complex True/False (or "boolean") values: bool A type for text (i.e., strings): str

14 Numeric Primitive Data The int type is for whole numbers: 7, -358, 0, -10, The float type is for decimal (or "floating-point") numbers: 7.6, -35.8, 0.0, -1.09, The complex type is for numbers with an imaginary component. (We probably will not use this type.) Each of these will have different behaviors and limitations, depending on a number of factors

15 Boolean Primitive Data A bool type can have either of two values: True False True and False are reserved words in Python A bool type can be useful for representing any two states such as a light bulb being on or off on = True

16 String (str) Data As mentioned earlier, a "string" is a sequence of zero or more characters You will use strings often, in different ways: Printing as output Fetching as input Comparing Reversing Converting to/from other types Work and practice to become comfortable with this type and its many uses

17 Characters Some languages, such as Java, have a character type, specifically Python does not, though, and if you need to use a character, you will likely just use a string consisting of a single character Each character, however, will correspond to an integer value in some character set, and there are methods to perform conversions: Integer to character: chr Example: chr(97) a Character to integer: ord Example: ord('a') 97

18 Character Sets A character set is an ordered list of characters, with each character corresponding to a unique number Python uses the Unicode character set The Unicode character set uses sixteen bits per character, allowing for 65,536 (2^16) unique characters It is an international character set, containing symbols and characters from many world languages

19 Characters The ASCII character set is older and smaller (8-bit) than Unicode, but is still quite popular (in C programs) The ASCII characters are a subset of the Unicode character set, including: uppercase letters lowercase letters punctuation digits special symbols control characters A, B, C, a,,, period, semi- olon, 0,,, &,, \, carriage return, tab,...

20 Variable Declaration A variable is a name for a location in memory A variable must be declared by specifying its name and its initial value name = "Bob". body_temp = light_on = False. In some languages (e.g., Java), variables are of a specific type, but Python is more flexible

21 Constants A constant is an identifier that is similar to a variable except that it is meant to hold the same value during its entire existence As the name implies, it is constant, not variable In Python, we indicate a constant using ALL CAPS MIN_HEIGHT = 69. This indicates that the value should not be changed after it is first declared Some programming languages will actually forbit you to change the value of a constant

22 Constants Constants are useful for three important reasons First, they give meaning to otherwise unclear literal values For example, NUM_STATES is more meaningful than the literal 50 Second, they facilitate program maintenance If a constant is used in multiple places and you need to change its value later, its value needs to be updated in only one place what if the country gets a 51 st state? Rather than having to find and change it in multiple places! Third, they formally show that a value should not change, avoiding inadvertent errors by other programmers

23 Value Assignment An assignment statement gives the variable an actual value in memory The equals sign provides this function total = 55 The expression on the right is evaluated and the result is stored as the value of the variable on the left Any value previously stored in total is overwritten Unlike some other languages, Python allows you to store any type of data in any variable. Other languages - like Java will restricted the kinds of values you can assign to a variable, based on its type

24 Variables and Literals i = 7 j = -8.7 k = 9 c = Hello World" is_it_on = True

### CSCI 2010 Principles of Computer Science. Data and Expressions 08/09/2013 CSCI

CSCI 2010 Principles of Computer Science Data and Expressions 08/09/2013 CSCI 2010 1 Data Types, Variables and Expressions in Java We look at the primitive data types, strings and expressions that are

### Data and Expressions. Outline. Data and Expressions 12/18/2010. Let's explore some other fundamental programming concepts. Chapter 2 focuses on:

Data and Expressions Data and Expressions Let's explore some other fundamental programming concepts Chapter 2 focuses on: Character Strings Primitive Data The Declaration And Use Of Variables Expressions

### Chapter. Let's explore some other fundamental programming concepts

Data and Expressions 2 Chapter 5 TH EDITION Lewis & Loftus java Software Solutions Foundations of Program Design 2007 Pearson Addison-Wesley. All rights reserved Data and Expressions Let's explore some

### A variable is a name for a location in memory A variable must be declared

Variables A variable is a name for a location in memory A variable must be declared, specifying the variable's name and the type of information that will be held in it data type variable name int total;

### Introduction to Java Chapters 1 and 2 The Java Language Section 1.1 Data & Expressions Sections

Introduction to Java Chapters 1 and 2 The Java Language Section 1.1 Data & Expressions Sections 2.1 2.5 Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013 2 Scope Introduce the Java programming

Table of Contents Date(s) Title/Topic Page #s 9/10 2.2 String Literals, 2.3 Variables and Assignment 34-35 Abstraction An abstraction hides (or suppresses) the right details at the right time An object

### Chapter 2: Data and Expressions

Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University January 15, 2015 Chapter 2: Data and Expressions CS 121 1 / 1 Chapter 2 Part 1: Data

### For the course, we will be using JCreator as the IDE (Integrated Development Environment).

For the course, we will be using JCreator as the IDE (Integrated Development Environment). We strongly advise that you install these to your own computers. If you do not have your own computer, the computer

### Java Basic Datatypees

Basic Datatypees Variables are nothing but reserved memory locations to store values. This means that when you create a variable you reserve some space in the memory. Based on the data type of a variable,

### Chapter 2: Data and Expressions

Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University August 21, 2017 Chapter 2: Data and Expressions CS 121 1 / 51 Chapter 1 Terminology Review

### 2 rd class Department of Programming. OOP with Java Programming

1. Structured Programming and Object-Oriented Programming During the 1970s and into the 80s, the primary software engineering methodology was structured programming. The structured programming approach

### Chapter 2: Data and Expressions

Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University April 21, 2015 Chapter 2: Data and Expressions CS 121 1 / 53 Chapter 2 Part 1: Data Types

### 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

### Program Elements -- Introduction

Program Elements -- Introduction We can now examine the core elements of programming Chapter 3 focuses on: data types variable declaration and use operators and expressions decisions and loops input and

### Chapter 2 Working with Data Types and Operators

JavaScript, Fourth Edition 2-1 Chapter 2 Working with Data Types and Operators At a Glance Instructor s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics

### 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

### Chapter 2 Using Data. Instructor s Manual Table of Contents. At a Glance. Overview. Objectives. Teaching Tips. Quick Quizzes. Class Discussion Topics

Java Programming, Sixth Edition 2-1 Chapter 2 Using Data At a Glance Instructor s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics Additional Projects Additional

### Learning objectives: Objects and Primitive Data. Introduction to Objects. A Predefined Object. The print versus the println Methods

CSI1102 Introduction to Software Design Chapter 2: Objects and Primitive Data Learning objectives: Objects and Primitive Data Introducing objects and their properties Predefined objects: System.out Variables

### Full file at

Java Programming, Fifth Edition 2-1 Chapter 2 Using Data within a Program At a Glance Instructor s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics Additional

CS313D: ADVANCED PROGRAMMING LANGUAGE Computer Science department Lecture 2 : C# Language Basics Lecture Contents 2 The C# language First program Variables and constants Input/output Expressions and casting

### CONTENTS: Compilation Data and Expressions COMP 202. More on Chapter 2

CONTENTS: Compilation Data and Expressions COMP 202 More on Chapter 2 Programming Language Levels There are many programming language levels: machine language assembly language high-level language Java,

Visual C# 2005 2-1 Chapter 2 Using Data At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class Discussion Topics Additional Projects Additional Resources Key Terms

### Getting started with Java

Getting started with Java Magic Lines public class MagicLines { public static void main(string[] args) { } } Comments Comments are lines in your code that get ignored during execution. Good for leaving

### CMPT 125: Lecture 3 Data and Expressions

CMPT 125: Lecture 3 Data and Expressions Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University January 3, 2009 1 Character Strings A character string is an object in Java,

### Chapter 2: Using Data

Chapter 2: Using Data TRUE/FALSE 1. A variable can hold more than one value at a time. F PTS: 1 REF: 52 2. The legal integer values are -2 31 through 2 31-1. These are the highest and lowest values that

### PYTHON- AN INNOVATION

PYTHON- AN INNOVATION As per CBSE curriculum Class 11 Chapter- 2 By- Neha Tyagi PGT (CS) KV 5 Jaipur(II Shift) Jaipur Region Python Introduction In order to provide an input, process it and to receive

### The Warhol Language Reference Manual

The Warhol Language Reference Manual Martina Atabong maa2247 Charvinia Neblett cdn2118 Samuel Nnodim son2105 Catherine Wes ciw2109 Sarina Xie sx2166 Introduction Warhol is a functional and imperative programming

### Chapter 2. Lexical Elements & Operators

Chapter 2. Lexical Elements & Operators Byoung-Tak Zhang TA: Hanock Kwak Biointelligence Laboratory School of Computer Science and Engineering Seoul National Univertisy http://bi.snu.ac.kr The C System

### 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

### 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

### CPS122 Lecture: From Python to Java last revised January 4, Objectives:

Objectives: CPS122 Lecture: From Python to Java last revised January 4, 2017 1. To introduce the notion of a compiled language 2. To introduce the notions of data type and a statically typed language 3.

### Lecture 2 Tao Wang 1

Lecture 2 Tao Wang 1 Objectives In this chapter, you will learn about: Modular programs Programming style Data types Arithmetic operations Variables and declaration statements Common programming errors

### TCL - STRINGS. Boolean value can be represented as 1, yes or true for true and 0, no, or false for false.

http://www.tutorialspoint.com/tcl-tk/tcl_strings.htm TCL - STRINGS Copyright tutorialspoint.com The primitive data-type of Tcl is string and often we can find quotes on Tcl as string only language. These

### 2: Basics of Java Programming

2: Basics of Java Programming CSC 1051 Algorithms and Data Structures I Dr. Mary-Angela Papalaskari Department of Computing Sciences Villanova University Course website: www.csc.villanova.edu/~map/1051/

### Chapter 2 Elementary Programming

Chapter 2 Elementary Programming Part I 1 Motivations In the preceding chapter, you learned how to create, compile, and run a Java program. Starting from this chapter, you will learn how to solve practical

### Declaration and Memory

Declaration and Memory With the declaration int width; the compiler will set aside a 4-byte (32-bit) block of memory (see right) The compiler has a symbol table, which will have an entry such as Identifier

### COMP Primitive and Class Types. Yi Hong May 14, 2015

COMP 110-001 Primitive and Class Types Yi Hong May 14, 2015 Review What are the two major parts of an object? What is the relationship between class and object? Design a simple class for Student How to

### 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

### Chapter 6 Primitive types

Chapter 6 Primitive types Lesson page 6-1. Primitive types Question 1. There are an infinite number of integers, so it would be too ineffient to have a type integer that would contain all of them. Question

### Advanced Algorithms and Computational Models (module A)

Advanced Algorithms and Computational Models (module A) Giacomo Fiumara giacomo.fiumara@unime.it 2014-2015 1 / 34 Python's built-in classes A class is immutable if each object of that class has a xed value

### CS11 Java. Fall Lecture 1

CS11 Java Fall 2006-2007 Lecture 1 Welcome! 8 Lectures Slides posted on CS11 website http://www.cs.caltech.edu/courses/cs11 7-8 Lab Assignments Made available on Mondays Due one week later Monday, 12 noon

### 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

### \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

### 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

### B.V. Patel Institute of BMC & IT, UTU 2014

BCA 3 rd Semester 030010301 - Java Programming Unit-1(Java Platform and Programming Elements) Q-1 Answer the following question in short. [1 Mark each] 1. Who is known as creator of JAVA? 2. Why do we

### CSc 10200! Introduction to Computing. Lecture 2-3 Edgardo Molina Fall 2013 City College of New York

CSc 10200! Introduction to Computing Lecture 2-3 Edgardo Molina Fall 2013 City College of New York 1 C++ for Engineers and Scientists Third Edition Chapter 2 Problem Solving Using C++ 2 Objectives In this

### Gabriel Hugh Elkaim Spring CMPE 013/L: C Programming. CMPE 013/L: C Programming

1 Literal Constants Definition A literal or a literal constant is a value, such as a number, character or string, which may be assigned to a variable or a constant. It may also be used directly as a function

### CS112 Lecture: Primitive Types, Operators, Strings

CS112 Lecture: Primitive Types, Operators, Strings Last revised 1/24/06 Objectives: 1. To explain the fundamental distinction between primitive types and reference types, and to introduce the Java primitive

### 6.096 Introduction to C++ January (IAP) 2009

MIT OpenCourseWare http://ocw.mit.edu 6.096 Introduction to C++ January (IAP) 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. Welcome to 6.096 Lecture

### Chapter 2 Basic Elements of C++

C++ Programming: From Problem Analysis to Program Design, Fifth Edition 2-1 Chapter 2 Basic Elements of C++ At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class Discussion

### 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

### Programming in Python 3

Programming in Python 3 Programming transforms your computer from a home appliance to a power tool Al Sweigart, The invent with Python Blog Programming Introduction Write programs that solve a problem

### Number Systems, Scalar Types, and Input and Output

Number Systems, Scalar Types, and Input and Output Outline: Binary, Octal, Hexadecimal, and Decimal Numbers Character Set Comments Declaration Data Types and Constants Integral Data Types Floating-Point

### TOPIC 2 INTRODUCTION TO JAVA AND DR JAVA

1 TOPIC 2 INTRODUCTION TO JAVA AND DR JAVA Notes adapted from Introduction to Computing and Programming with Java: A Multimedia Approach by M. Guzdial and B. Ericson, and instructor materials prepared

### Introduction To Java. Chapter 1. Origins of the Java Language. Origins of the Java Language. Objects and Methods. Origins of the Java Language

Chapter 1 Getting Started Introduction To Java Most people are familiar with Java as a language for Internet applications We will study Java as a general purpose programming language The syntax of expressions

### Language Reference Manual

ALACS Language Reference Manual Manager: Gabriel Lopez (gal2129) Language Guru: Gabriel Kramer-Garcia (glk2110) System Architect: Candace Johnson (crj2121) Tester: Terence Jacobs (tj2316) Table of Contents

### 4 Programming Fundamentals. Introduction to Programming 1 1

4 Programming Fundamentals Introduction to Programming 1 1 Objectives At the end of the lesson, the student should be able to: Identify the basic parts of a Java program Differentiate among Java literals,

### Strings, characters and character literals

Strings, characters and character literals Internally, computers only manipulate bits of data; every item of data input can be represented as a number encoded in base 2. However, when it comes to processing

### Chapter 2: Using Data

Chapter 2: Using Data TRUE/FALSE 1. A variable can hold more than one value at a time. F PTS: 1 REF: 52 2. The legal integer values are -2 31 through 2 31-1. These are the highest and lowest values that

### Bits. Binary Digits. 0 or 1

Data Representation Bits Binary Digits 0 or 1 Everything stored in a computer is stored as bits. Bits can mean different things depending on how the software or hardware interpret the bits Bits are usually

### CSc Introduction to Computing

CSc 10200 Introduction to Computing Lecture 2 Edgardo Molina Fall 2011 - City College of New York Thursday, September 1, 2011 Introduction to C++ Modular program: A program consisting of interrelated segments

### Python Input, output and variables. Lecture 23 COMPSCI111/111G SS 2018

Python Input, output and variables Lecture 23 COMPSCI111/111G SS 2018 1 Today s lecture What is Python? Displaying text on screen using print() Variables Numbers and basic arithmetic Getting input from

### A First Look at ML. Chapter Five Modern Programming Languages, 2nd ed. 1

A First Look at ML Chapter Five Modern Programming Languages, 2nd ed. 1 ML Meta Language One of the more popular functional languages (which, admittedly, isn t saying much) Edinburgh, 1974, Robin Milner

### Python Input, output and variables

Today s lecture Python Input, output and variables Lecture 22 COMPSCI111/111G SS 2016! What is Python?! Displaying text on screen using print()! Variables! Numbers and basic arithmetic! Getting input from

### Variables and Values

Variables and Values Names Variables (which hold values) and functions (which are blocks of code) both have names Names must begin with a letter and may contain letters, digits, and underscores Names are

### COMP6700/2140 Data and Types

COMP6700/2140 Data and Types Alexei B Khorev and Josh Milthorpe Research School of Computer Science, ANU February 2017 Alexei B Khorev and Josh Milthorpe (RSCS, ANU) COMP6700/2140 Data and Types February

### 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

### Introduction to Python Programming

2 Introduction to Python Programming Objectives To understand a typical Python program-development environment. To write simple computer programs in Python. To use simple input and output statements. To

### FRAC: Language Reference Manual

FRAC: Language Reference Manual Justin Chiang jc4127 Kunal Kamath kak2211 Calvin Li ctl2124 Anne Zhang az2350 1. Introduction FRAC is a domain-specific programming language that enables the programmer

### PHP. Interactive Web Systems

PHP Interactive Web Systems PHP PHP is an open-source server side scripting language. PHP stands for PHP: Hypertext Preprocessor One of the most popular server side languages Second most popular on GitHub

### Programming for Engineers Introduction to C

Programming for Engineers Introduction to C ICEN 200 Spring 2018 Prof. Dola Saha 1 Simple Program 2 Comments // Fig. 2.1: fig02_01.c // A first program in C begin with //, indicating that these two lines

### Python Input, output and variables. Lecture 22 COMPSCI111/111G SS 2016

Python Input, output and variables Lecture 22 COMPSCI111/111G SS 2016 Today s lecture u What is Python? u Displaying text on screen using print() u Variables u Numbers and basic arithmetic u Getting input

### Java Bytecode (binary file)

Java is Compiled Unlike Python, which is an interpreted langauge, Java code is compiled. In Java, a compiler reads in a Java source file (the code that we write), and it translates that code into bytecode.

### L-System Fractal Generator: Language Reference Manual

L-System Fractal Generator: Language Reference Manual Michael Eng, Jervis Muindi, Timothy Sun Contents 1 Program Definition 3 2 Lexical Conventions 3 2.1 Comments...............................................

### Lecture Set 2: Starting Java

Lecture Set 2: Starting Java 1. Java Concepts 2. Java Programming Basics 3. User output 4. Variables and types 5. Expressions 6. User input 7. Uninitialized Variables 0 This Course: Intro to Procedural

### CS4120/4121/5120/5121 Spring 2016 Xi Language Specification Cornell University Version of May 11, 2016

CS4120/4121/5120/5121 Spring 2016 Xi Language Specification Cornell University Version of May 11, 2016 In this course you will start by building a compiler for a language called Xi. This is an imperative,

### ECE 122 Engineering Problem Solving with Java

ECE 122 Engineering Problem Solving with Java Lecture 3 Expression Evaluation and Program Interaction Outline Problem: How do I input data and use it in complicated expressions Creating complicated expressions

### Lecture Set 2: Starting Java

Lecture Set 2: Starting Java 1. Java Concepts 2. Java Programming Basics 3. User output 4. Variables and types 5. Expressions 6. User input 7. Uninitialized Variables 0 This Course: Intro to Procedural

### Chapter 1. Introduction to Computers and Programming. M hiwa ahmad aziz

. Chapter 1 Introduction to Computers and Programming www.raparinweb.com M hiwa ahmad aziz 1 Ch 1 - Introduction to Computers and Programming Hardware Terminology Main Memory Auxiliary Memory Drives Writing

### CSc 372. Comparative Programming Languages. 4 : Haskell Basics. Department of Computer Science University of Arizona

1/40 CSc 372 Comparative Programming Languages 4 : Haskell Basics Department of Computer Science University of Arizona collberg@gmail.com Copyright c 2013 Christian Collberg 2/40 The Hugs Interpreter The

### Final Labs and Tutors

ICT106 Fundamentals of Computer Systems - Topic 2 REPRESENTATION AND STORAGE OF INFORMATION Reading: Linux Assembly Programming Language, Ch 2.4-2.9 and 3.6-3.8 Final Labs and Tutors Venue and time South

### BITG 1233: Introduction to C++

BITG 1233: Introduction to C++ 1 Learning Outcomes At the end of this lecture, you should be able to: Identify basic structure of C++ program (pg 3) Describe the concepts of : Character set. (pg 11) Token

### Java Notes. 10th ICSE. Saravanan Ganesh

Java Notes 10th ICSE Saravanan Ganesh 13 Java Character Set Character set is a set of valid characters that a language can recognise A character represents any letter, digit or any other sign Java uses

### CSc 372 Comparative Programming Languages. 4 : Haskell Basics

CSc 372 Comparative Programming Languages 4 : Haskell Basics Christian Collberg Department of Computer Science University of Arizona collberg@gmail.com Copyright c 2011 Christian Collberg August 23, 2011

### CPS122 Lecture: From Python to Java

Objectives: CPS122 Lecture: From Python to Java last revised January 7, 2013 1. To introduce the notion of a compiled language 2. To introduce the notions of data type and a statically typed language 3.

### TUGCE KEMEROZ - ASLI OZKAN - AYSE TARTAN. Week 12/02/ /02/2007 Lecture Notes:

1 INSTRUCTOR: FAZLI CAN TUGCE KEMEROZ - ASLI OZKAN - AYSE TARTAN Week 12/02/2007-16/02/2007 Lecture Notes: When we write a program we must design our programs to take correct output. For correct output,

### Standard 11. Lesson 9. Introduction to C++( Up to Operators) 2. List any two benefits of learning C++?(Any two points)

Standard 11 Lesson 9 Introduction to C++( Up to Operators) 2MARKS 1. Why C++ is called hybrid language? C++ supports both procedural and Object Oriented Programming paradigms. Thus, C++ is called as a

### Operations. Making Things Happen

Operations Making Things Happen Object Review and Continue Lecture 1 2 Object Categories There are three kinds of objects: Literals: unnamed objects having a value (0, -3, 2.5, 2.998e8, 'A', "Hello\n",...)

### UNIT - I. Introduction to C Programming. BY A. Vijay Bharath

UNIT - I Introduction to C Programming Introduction to C C was originally developed in the year 1970s by Dennis Ritchie at Bell Laboratories, Inc. C is a general-purpose programming language. It has been

### CP122 Computer Science I. Chapter 2: Data Types, Variables, and I/O

CP122 Computer Science I Chapter 2: Data Types, Variables, and I/O Course blogger? QRC Tutoring Tech News! President Obama proposes overhaul of NSA data collection Tech News! President Obama proposes overhaul

### COMP519 Web Programming Lecture 17: Python (Part 1) Handouts

COMP519 Web Programming Lecture 17: Python (Part 1) Handouts Ullrich Hustadt Department of Computer Science School of Electrical Engineering, Electronics, and Computer Science University of Liverpool Contents

### Lesson 02 Data Types and Statements. MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL

Lesson 02 Data Types and Statements MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL Topics Covered Statements Variables Constants Data Types

### What did we talk about last time? Examples switch statements

Week 4 - Friday What did we talk about last time? Examples switch statements History of computers Hardware Software development Basic Java syntax Output with System.out.print() Mechanical Calculation

### 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

### 2 nd Week Lecture Notes

2 nd Week Lecture Notes Scope of variables All the variables that we intend to use in a program must have been declared with its type specifier in an earlier point in the code, like we did in the previous

### A First Program - Greeting.cpp

C++ Basics A First Program - Greeting.cpp Preprocessor directives Function named main() indicates start of program // Program: Display greetings #include using namespace std; int main() { cout

### 12/22/11. Java How to Program, 9/e. Help you get started with Eclipse and NetBeans integrated development environments.

Java How to Program, 9/e Education, Inc. All Rights Reserved. } Java application programming } Use tools from the JDK to compile and run programs. } Videos at www.deitel.com/books/jhtp9/ Help you get started