Java Control Structures Quiz

Control Structures in Java

• The three main control structures in any programming language are selection, repetition, and sequence.

Selection Structures

• Selection structures are used to choose between alternative courses of action in a Java program.
• The keyword 'if' is used in selection structures, followed by a boolean expression.
• The 'else' statement is used in the 'if/else' selection structure to specify an alternative course of action when the condition is false.

If Statement in Java

• The syntax of the if statement in Java is if (boolean expression) { statements }.
• The >= operator is used to check if a value is greater than or equal to another value in Java.
• The == operator represents equality comparison in Java, checking if two values are equal.

If Statement Examples

• if (length == width) { System.out.print("it is square"); }: This code checks if the length is equal to the width, and prints "it is square" if true.
• if (hrsWked > 38) { System.out.print("Overtime hours: " + (hrsWked - 38)); }: This code checks if the hours worked is greater than 38, and prints the overtime hours if true.
• if (totalPrice >= 100) { disc = totalPrice *.1; totalPrice = totalPrice - disc; }: This code checks if the total price is greater than or equal to 100, and applies a 10% discount if true.
• if (balance > 0) { fee = 0; }: This code checks if the balance is greater than 0, and sets the fee to 0 if true.

If Statement Rules

• Indentation is used to denote the block of code within the if statement.
• If the expression in an if statement is false, the code within the if block is skipped.
• The >= operator represents "greater than or equal to" in Java.

Test your knowledge of Java control structures with this quiz. Learn about sequence, selection, and repetition/iteration in Java programming, including if, if/else, switch, for, while, and do/while statements.