Question

How to calculate the area of a circle with constant PI in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        public const double PI = 3.14; 

        static void Main(string[] args)
        {
            double radius = 13.0;
            double area = PI * radius * radius;

            Console.WriteLine("Area = {0}", area);
        }
    }
}


/*
run:
   
Area = 530.66
  
*/

 

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