Ok, I have to write a code snippet that prints out the value of 2 to the powers of 1 – 31 in a 10 character width, right-justified column. You may not use any literals or Math methods.

Seeing as Im not allowed to use Math.pow, the only other option I can see is a for loop that counts from 1 to 31 and 32 if statements for each count does the correct multiplication of an integer at each count and finally prints out the integer.

int value = 0;

for (int counter = 0; counter < 32; counter++)
        {
                if (counter == 1)
                      value = 2 * counter;
                if (counter == 2)
                      value = 2 * counter;
                if (counter == 3)
                       value = 2 * 2 * 2;
                if (counter == 4)
                       value = 2 * 2 * 2 * 2;
                 
               System.out.print(value + " ");

Please advise if you see a better more efficient way of coding this that Im not seeing?

Maximum value is to stored with int type is 2147483647. So, you cannot use value of int type.

Tryout this code:

long value=1;
      for(int i=1;i<=31;i++)
       {
          value=value * 2;
          System.out.println(i +  " " + value);
       }
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