Java If-Else Statements

The if and else statements in Java are control structures that allow you to execute code based on conditions. Let’s dive into their usage.

The `if` Statement

The if statement executes a block of code if its condition evaluates to true:

int number = 10;
    if (number > 5) {
        System.out.println("Number is greater than 5.");
    }

Adding `else`

The else statement runs a block of code if the condition is false:

int number = 3;
    if (number > 5) {
        System.out.println("Number is greater than 5.");
    } else {
        System.out.println("Number is 5 or less.");
    }

Using `else if`

To handle multiple conditions, use else if:

int number = 8;
    if (number > 10) {
        System.out.println("Number is greater than 10.");
    } else if (number > 5) {
        System.out.println("Number is greater than 5 but not greater than 10.");
    } else {
        System.out.println("Number is 5 or less.");
    }

Nested `if` Statements

You can nest if statements to check more complex conditions:

int x = 7, y = 12;
    if (x > 5) {
        if (y > 10) {
            System.out.println("x is greater than 5 and y is greater than 10.");
        }
    }

Output:

x is greater than 5 and y is greater than 10.

Next Steps

Practice writing programs with decision-making logic. Mastering if, else, and else if will enable you to build dynamic and interactive Java applications. Now you can learn about loops!

Java If-Else Statements

The if Statement

Adding else