Area of circle

Question

By using instant method

Answer 1

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

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
const double pi = 3.14;
double radius;
double area;
//your code goes here
radius = Convert.ToDouble(Console.ReadLine());

Console.WriteLine(pi*radius*radius);
}
}
}
Hope, this will help you.

Answer 2

Copy this and like my answer please and check

Answer 3

get it's pi*r²