Answer to Question #233570 in Java | JSP | JSF for Aru

Question

Q-3

Single File Programming Question

Your little brother has a math assignment to find whether the given u power of 2. If it is a power of 2 then he has to find the sum of the digit power of 2, then he has to find the next number which is a power of your help to validate his work. But you are already busy playing video games Develop a program so that your brother can validate his work by

Example 1

Input

64

Output

Answer 1

import java.util.Scanner;


public class Main
{
//The function that will will check if a number is power of 2
static boolean power_of_2(int number)
{
  
  if (number == 1)
    return true;
 
  
  else if (number % 2 != 0 ||
           number ==0)
    return false;
 
  // recursive calling of the function
  return power_of_2(number / 2);
}
 static int sum_of_Digits(int number)
    {
        return number == 0 ? 0 : number%10 + 
                  sum_of_Digits(number/10) ;
    }
	
public static int  next_power_of_2 ( int  number )
{
	int val = 1;
	 
	
	while(val<=number)
	{
		val=val << 1;
	}
	return val ;
}
	public static void main(String[] args) {


int n;


Scanner input = new Scanner(System.in);
System.out.println("Enter the number\n");
n = input.nextInt();
if(power_of_2(n)==true){
    System.out.printf("%d is a power of 2\n", n);
    System.out.println("The sum of the digits of the number is:\t"+ sum_of_Digits(n));


}
else{
  System.out.printf(" %d is not a power of two\n",n);
  System.out.println("The next power of two is:  "+next_power_of_2(n));
}




	
	}
}