This is a Java Program to Implement Cubic convergence 1/pi Algorithm. Cubic convergence is an algorithm used to calculate the value of 1/p.

Here is the source code of the Java Program to Implement Cubic convergence 1/pi Algorithm. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

`/**`

`** Java Program to Implement Cubic convergence 1/pi Algorithm`

`**/`

import java.util.Scanner;

`/** Class CubicConvergencePi **/`

public class CubicConvergencePi

`{`

`/** compute 1/pi **/`

public double getOneByPi(int k)

`{`

double ak = 1.0/3.0;

double sk = (Math.sqrt(3) - 1)/2;

double ak1, sk1, rk1;

for (int i = 0; i < k; i++)

`{`

rk1 = 3.0 / (1 + 2 * Math.pow((1 - sk * sk * sk), (1.0/3.0)));

sk1 = (rk1 - 1)/2.0;

ak1 = rk1 * rk1 * ak - Math.pow(3, i) * (rk1 * rk1 - 1);

ak = ak1;

sk = sk1;

`}`

return ak;

`}`

`/** Main function **/`

public static void main (String[] args)

`{`

Scanner scan = new Scanner(System.in);

System.out.println("Cubic Convergence 1/Pi Algorithm Test\n");

`/** Make an object of CubicConvergence class **/`

CubicConvergencePi cc = new CubicConvergencePi ();

System.out.println("Enter number of iterations");

int k = scan.nextInt();

System.out.println("\nValue of 1/pi : "+ cc.getOneByPi(k));

`}`

`}`

Cubic Convergence 1/Pi Algorithm Test Enter number of iterations 3 Value of 1/pi : 0.3183098861837896

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