Java Program On Mersenne number

What is Mersenne number? A number which can be represented in the form of 2^n-1 is a Mersenne number.

For example 127 is a Mersenne number as 2^7-1 equals to 127

import java.util.*;

class Mersenne

{

int i=1,n;

Scanner sc=new Scanner(System.in);

void show()

{

System.out.print(“Enter the number:”);

n=sc.nextInt();

for(;;)

{

If(n==Math.pow(2,i)-1)

{

 System.out.print(“Mersenne Number.”);

break;

}

else if(Math.pow(2,i)-1>n)

{

System.out.print(“Not Mersenne Number.”);

break

}

i++;

}

}

public static void main(String args[])

{

 Mersenne ob=new Mersenne ();

ob.show();

}

}