If statement in Java - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an if statement in Java?

An if statement lets the program decide to run some code only if a condition is true. It helps the program make choices.

beginner

Write the basic syntax of an if statement in Java.

The basic syntax is:<br>

if (condition) {<br>  // code to run if condition is true<br>}

beginner

What happens if the condition in an if statement is false?

If the condition is false, the code inside the if block does not run. The program skips it and continues.

beginner

Can an if statement be used without an else part?

Yes, an if statement can stand alone. The else part is optional and runs code when the condition is false.

beginner

How do you write an if-else statement in Java?

You write it like this:<br>

if (condition) {<br>  // code if true<br>} else {<br>  // code if false<br>}

What does the if statement check in Java?

A A condition that is true or false

B A loop counter

C A variable declaration

D A method call

The if statement checks a condition that evaluates to true or false to decide which code to run.

What happens if the if condition is false and there is no else?

A The program skips the <code>if</code> block and continues

B The program runs the code inside the <code>if</code> block

C The program stops running

D The program throws an error

If the condition is false and no else is present, the program skips the if block and continues.

Which of these is the correct syntax for an if statement?

A if condition { }

B if condition then { }

C if [condition] { }

D if (condition) { }

In Java, the condition must be inside parentheses: if (condition) { }.

Can you have multiple if statements one after another?

A No, only one <code>if</code> per program

B Only if they have <code>else</code> parts

C Yes, you can have many <code>if</code> statements

D Only if they are inside a loop

You can have many if statements in a program to check different conditions.

What keyword do you use to run code when an if condition is false?

A elseif

B else

C when

D otherwise

The keyword else runs code when the if condition is false.

Explain how an if statement works in Java and write a simple example.

Think about how you decide to do something only if a certain condition is true.

Describe the difference between an if statement and an if-else statement.

Consider what happens when the condition is false.