Programming Workshop One: Additional Exercises
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1. Modify your bmi.pl script to print the BMI with one digit after 
   the point, e.g. 20.7, 18.5, etc.

2. Modify your program in Exercise 3.12 to determine whether a number of
   an arbitrary length is a palindrome or not. Again use only the
   arithmentic operators. Does your program run correctly for the
   following numbers:

   111111
   0
   123456654321

   How large a number can your program handle?

3. Solve the palindrome problem from Exercise 3.12 using arrays.
 
4. Complete Exercise 3.14 Parts b and c

5. Complete Exercises 3.13 and 3.14 Part a. 

6. Complete exercises 4.7 and 4.9.