What is a Method?

• A method is a block of code that performs a specific task.
• It is like a function in other programming languages.
• Methods are used to:
  • Break down complex problems into smaller pieces.
  • Avoid code repetition.
  • Improve code readability and maintainability.
• Once defined, a method can be called multiple times.

Why Use Methods?

• Reusability: Write once, use many times.
• Modularity: Divide program into logical parts.
• Abstraction: Hide implementation details.
• Ease of debugging: Test and fix individual methods.
• Code organization: Cleaner structure.

Method Declaration Syntax

accessModifier [static] returnType methodName(parameterList) {
    // method body
    // optionally return a value
}

• accessModifier: public, private, protected, or default (package‑private).
• static: Optional – indicates class‑level method.
• returnType: Data type of value returned, or void if nothing returned.
• methodName: Should be a verb in camelCase (e.g., calculateSum).
• parameterList: Comma‑separated list of input parameters (type + name).

Simple Method Example