What is a Method?

Instead of writing the same statements repeatedly, we can place them inside a method and call that method whenever needed.

Example 1: Calling a Method

class ShikshaSanchar {
    // Method definition
    static void add() {
        int a = 10;
        int b = 20;
        System.out.println(a + b);
    }

    public static void main(String[] args) {
        // Method call
        add();
    }
}

Why Use Methods?

• They divide a program into smaller parts.
• They avoid repeated code.
• They make code easier to read and maintain.
• They make code reusable.

Method Syntax

The diagram below shows the basic structure of a Java method and the purpose of each part.

Example 2: A Method That Returns a Value

class ShikshaSanchar {
    // Method definition: returns the sum of two values
    static int add(int a, int b) {
        return a + b;
    }

    public static void main(String[] args) {
        // Method call
        System.out.println(add(10, 20));
    }
}

Example 3: A void Method

class ShikshaSanchar {
    // Method definition: prints a message and returns no value
    static void welcome() {
        System.out.println("Welcome to Java");
    }

    public static void main(String[] args) {
        // Method call
        welcome();
    }
}

Defining and Calling a Method

Writing a method is called defining a method. A defined method runs only when it is called.

Example 4: Define and Call

class ShikshaSanchar {
    // Method definition
    static void message() {
        System.out.println("Hello");
    }

    public static void main(String[] args) {
        // Method call
        message();
    }
}

Key Points: