CSE 1321 Module 1 A Programming Primer 9112021

Skeletons BEGIN MAIN END MAIN Note: every time you BEGIN something, you must END

Skeletons class Main. Class { public static void main (String[] args) { } }

Printing BEGIN MAIN PRINT “Hello, World!” PRINT “Bob” + “ was” + “ here”

Printing class Main. Class { public static void main (String[] args) { System. out.

Declaring/Assigning Variables user. Name BEGIN MAIN “Bob” CREATE user. Name CREATE student. GPA user.

Declaring/Assigning Variables class Main. Class { public static void main (String[] args) { String

Reading Text from the User BEGIN MAIN CREATE user. Input PRINT “Please enter your

Reading Text from the User import java. util. Scanner; class Main. Class { public

Reading Numbers from the User BEGIN MAIN CREATE user. Input PRINT “Please enter your

Reading Numbers from the User import java. util. Scanner; class Main. Class { public

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CSE 1321 - Module 1 A Programming Primer 9/11/2021 CSE 1321 MODULE 1 1

Skeletons BEGIN MAIN END MAIN Note: every time you BEGIN something, you must END it! Write them as pairs! 9/11/2021 CSE 1321 MODULE 1 Ps 2

Skeletons class Main. Class { public static void main (String[] args) { } } Note: Capitalization matters! 9/11/2021 CSE 1321 MODULE 1 3

Printing BEGIN MAIN PRINT “Hello, World!” PRINT “Bob” + “ was” + “ here” END MAIN Ps 9/11/2021 CSE 1321 MODULE 1 4

Printing class Main. Class { public static void main (String[] args) { System. out. println("Hello, World!"); System. out. println("Bob"+" was"+" here"); } } Note: There’s also a System. out. print() 9/11/2021 CSE 1321 MODULE 1 5

Declaring/Assigning Variables user. Name BEGIN MAIN “Bob” CREATE user. Name CREATE student. GPA user. Name student. GPA ← “Bob” 1. 2 student. GPA ← 1. 2 END MAIN Ps 9/11/2021 CSE 1321 MODULE 1 6

Declaring/Assigning Variables class Main. Class { public static void main (String[] args) { String user. Name; float gpa; user. Name = "Bob"; gpa = 1. 2 f; } } 9/11/2021 CSE 1321 MODULE 1 7

Reading Text from the User BEGIN MAIN CREATE user. Input PRINT “Please enter your name” READ user. Input PRINT “Hello, ” + user. Input END MAIN Ps 9/11/2021 CSE 1321 MODULE 1 8

Reading Text from the User import java. util. Scanner; class Main. Class { public static void main (String[] args) { String user. Input; System. out. print("Please enter your name: "); Scanner sc = new Scanner (System. in); user. Input = sc. next. Line(); System. out. println("Hello, "+user. Input); } } 9/11/2021 CSE 1321 MODULE 1 9

Reading Numbers from the User BEGIN MAIN CREATE user. Input PRINT “Please enter your age: ” READ user. Input PRINT “You are ” + user. Input + “ years old. ” END MAIN Ps 9/11/2021 CSE 1321 MODULE 1 10

Reading Numbers from the User import java. util. Scanner; class Main. Class { public static void main (String[] args) { int age; System. out. print("Please enter your age: "); Scanner sc = new Scanner (System. in); age = sc. next. Int(); System. out. println("You are "+age+" years old. "); } } 9/11/2021 CSE 1321 MODULE 1 11

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