Question

Write the definition of a method named printPowerOfTwoStars that receives a non-negative integer n and prints a string consisting of "2 to the n" asterisks. So, if the method received 4 it would print 2 to the 4 asterisks, that is, 16 asterisks: ����**************** and if it received 0 it would print 2 to the 0 (i.e. 1) asterisks:

Answer 1

import java.io.*;

import java.util.*;

import java.lang.Math;

class GFG {

public static void PowerOfTwoStars(int n){

double a=Math.pow(2,n); //calculating the power..

for (int i=1;i<=a;i++)//looping to print the stars.

{

System.out.print("*");

}

}

public static void main (String[] args) {

Scanner star=new Scanner(System.in);//creating the scanner class object.

int n=star.nextInt();//taking input.

PowerOfTwoStars(n);//calling the function.

}

}

Input:-

3

Output:-

********

Step-by-step explanation:

In the method PowerOfTwoStars which contains one argument I have calculated the power that is 2 to the n.Then looping form 1 to power and printing the stars and for better explanation please refer the comments the code.