Math Abs() Method in C#

using System;
class Demo {
   public static void Main(){
      Double val1 = 30.40;
      Double val2 = Double.MinValue;
      Double val3 = Double.MaxValue;
      Console.WriteLine("Absolute value of {0} : {1}", val1, Math.Abs(val1));
      Console.WriteLine("Absolute value of {0} : {1}", val2, Math.Abs(val2));
      Console.WriteLine("Absolute value of {0} : {1}", val3, Math.Abs(val3));
   }
}