Chapter 4, Problem 22RE

What do the following program segments print? Find the answers by tracing the code, not by using the computer.

1. a. int n = 1;

   for (int i = 2; i < 5; i++) { n = n + i; }

   System.out.print(n);

2. b. int i;

   double n = 1 / 2;

   for (i = 2; i <= 5; i++) { n = n + 1.0 / i; }

   System.out.print(i);

3. c. double x = 1;

   double y = 1;

   int i = 0;

   do

   {

    y = y /2;

    x = x + y;

    i++;

   }

   while (x < 1.8);

   System.out.print(i);

4. d. double x = 1;

   double y = 1;

   int i = 0;

   while (y >= 1.5)

   {

    x = x / 2;

    y = x + y;

    i++;

  }

  System.out.print(i);