Return Types

Return Types

A method's return type declares what kind of value it hands back to its caller with the return keyword. A method that returns nothing uses void. Every code path in a non-void method must return a value, or the compiler raises an error.

Warning: Leaving out a return on some code path of a non-void method is a compile error, not a runtime one.

Example: Return Types

using System;

class Program
{
    static int Square(int n)
    {
        return n * n;
    }

    static void Main(string[] args)
    {
        int result = Square(6);
        Console.WriteLine(result);
    }
}