how this logic works

hi,

in your code:

step 1

using System;
    class Class3
    {
        static void Main()
        {    
            int num1 = 10, num2 = 5;// initialise the value of num1 to 10 and num2 to 5
            num1 -=num2;// here it will substract num1 with num2 and assign it to num1. the new value is 5
                Console.WriteLine("Addition is {0}",num1); // it will print the num1 value.
                Console.ReadLine();
        }
    }

Output: 5