How to find the absolute value of a number in C# ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AbundantcodeConsoleApp
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            // How to find the absolute value of a number in C# ?
            int input = -1996;
            if (input < 0)
            {
                input = input * -1;
            }
            
            Console.WriteLine("Absolute value : " + input);
            Console.ReadLine();
        }
    }
    
}