Methods

Context: Methods define the behavior of a class. They can have parameters and return a value (or void).

Syntax

[access modifier] returnType MethodName(parameters)
{
    // body
}

Example

public class Calculator
{
    public int Add(int a, int b) => a + b;
    public void PrintSum(int a, int b)
    {
        Console.WriteLine($"{a} + {b} = {Add(a, b)}");
    }
}

Parameters

• Value parameters (default) – copy passed.
• Reference parameters (ref) – modify original.
• Output parameters (out) – return multiple values.
• Parameter arrays (params) – variable number of arguments.

public void Modify(ref int x) => x *= 2;
public bool TryParse(string input, out int result) => int.TryParse(input, out result);
public int Sum(params int[] numbers) => numbers.Sum();

Method Overloading

Same name, different parameters.

public int Multiply(int a, int b) => a * b;
public double Multiply(double a, double b) => a * b;