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Java If-else Statement

The Java if statement is used to test the condition. It checks boolean condition: true or false. There are various types of if statement in Java.

  • if statement
  • if-else statement
  • if-else-if ladder
  • nested if statement

Java if Statement

The Java if statement tests the condition. It executes the if block if condition is true.

Syntax:

if statement in java

Example:

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Output:

Age is greater than 18  

Java if-else Statement

The Java if-else statement also tests the condition. It executes the if block if condition is true otherwise else block is executed.

Syntax:

if-else statement in java

Example:

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Output:

odd number  

Leap Year Example:

A year is leap, if it is divisible by 4 and 400. But, not by 100.

Output:

LEAP YEAR  

Using Ternary Operator

We can also use ternary operator (? 🙂 to perform the task of if…else statement. It is a shorthand way to check the condition. If the condition is true, the result of ? is returned. But, if the condition is false, the result of : is returned.

Example:

Output:

odd number  

Java if-else-if ladder Statement

The if-else-if ladder statement executes one condition from multiple statements.

Syntax:

if-else-if ladder statement in java

Example:

Output:

C grade  

Program to check POSITIVE, NEGATIVE or ZERO:

Output:

NEGATIVE  

Java Nested if statement

The nested if statement represents the if block within another if block. Here, the inner if block condition executes only when outer if block condition is true.

Syntax:

Java Nested If Statement

Example:

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Output:

You are eligible to donate blood  

Example 2:

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Output:

You are not eligible to donate blood  

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