Solutions to Sample Final Exam Questions

1. Write a while-loop that uses the println function to print the numbers from 15 to 188 on the console:

   15
   16
   17
   18
   ...
   187
   188
   

   Solution:

   int i = 15;
   while (i <= 188) {
      println(i);
      ++i;
   }

2. Suppose age is a variable of type int that has already been defined and given a value (although you don’t know what the value is). Using if-statements, write code that does the following:

   • if age is 0 or less, then print “that’s impossible!”
   • if age is 1 or 2, then print “you’re very young”
   • if age is 3 to 12, then print “Pokemon rocks!”
   • if age is 13 to 19, then print “you’re a teenager”
   • if age is 20 or more, then print “you are incredibly old”

   Your code should print exactly one message.

   Solution:

   if (age <= 0) {
      println("that's impossible!");
   } else if (age == 1 || age == 2) {
      println("you're very young");
   } else if (age >= 3 && age <= 12) {
      println("Pokemon rocks!");
   } else if (age >= 13 && age <= 19) {
      println("you're a teenager");
   } else if (age >= 20) {
      println("you are incredibly old");
   }