Chapter 4, Problem 21RE

What do the following loops print? Work out the answer by tracing the code, not by using the computer.

1. a. Int s = 1;

   for (int n = 1; n <= 5; n++)

   {

    s = s + n;

    System.out.print(s + " ");

   }

2. b. int s = 1;

   for (int n = 1; s <= 10; System.out.print(s + " "))

   {

    n = n + 2;

    s = s + n;

   }

3. c. int s = 1;

   int n;

   for (n = 1; n <= S; n++)

   {

    s = s + n;

    n++;

   }

   System.out.print(s + " " + n);