Question

Java program to print all the powers of 2 below a certain number. Calculate sum, accept upper limit and make sure sum variable is long type.  

Run-

Enter the upper limit: 100

5 + 8 + 9 + 11 + 20 + 32 + 30 = 115

Answer 1

import java.util.Scanner;

public class SumSqure {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("Enter upper limit: ");
       int upper=sc.nextInt();
       long temp,sum=0;
       //iterating untill the upper limit
       for(int i=0;;i++){
           //generate powers of 2
           temp=(long)Math.pow(2, i);
           //checking if generated power is in range
           if(temp<=upper){
               System.out.print(temp+" ");
               sum+=temp;
           }
           else{
               break;
           }
       }
       System.out.println(" = "+sum);
   }
}

The given sample output looks wrong