Java Program to Find Arc Length from Given Angle

import java.io.*;
class Main
{
    public static void main(String [] args)
    {
        //diameter declared
        double D = 4;
        //angle of arc of circle declared
        double A = 45;
        //pie value declared
        double pi = 3.14;
        // formula to find arc length
        double L = (pi * D) * (A / 360);
        if(A > 360)
            System.out.println("Not possible");
        else
            System.out.println("The arc length is:" + L);
    }
}

Output:

The arc length is:1.57