Java Conditional Statements: Learn How to Use If and Else in Java

In Java, the if statement is a conditional control structure used to make decisions based on whether a specified condition is true or false. It allows you to execute a block of code if the condition is met, and optionally execute another block of code if the condition is not met using an else clause. The condition inside the if statement must be a boolean expression, which evaluates to either true or false.

This example demonstrates the use of if and if-else statements in Java. It checks if the age is greater than or equal to 18 and displays a message accordingly. Additionally, it demonstrates a nested if statement to check if a number is positive and even or odd.