using System;

int subtractTwoNumbers(int a, int b) // parameters are inside ()

{

    return a - b; // a and b are function variables with a scope only inside the funtion

}

​

var sum = subtractTwoNumbers(105, 99);

Console.WriteLine(sum);

Console.WriteLine(subtractTwoNumbers(2, 2));

​

Console.WriteLine(subtractTwoNumbers(55, 2));

​

int addTwoNumbers(int a, int b)

{

    return a + b;

}

​

Console.WriteLine(addTwoNumbers(5, 5));