CPSC120A
Fundamentals of Computer Science I

Explain why functions are useful.

For each of the following snippets of Python code, give what would be printed to the command line if run. If the snippet will not print anything because of an error, just put error.

1. eggs = 7
   
   if eggs > 0 and eggs < 5:
       print(eggs)
   if eggs < 7:
       print(eggs ** 2)
   else:
       print(eggs // 2)
         

2. def spam(eggs):
       return eggs * eggs
   ham = spam(spam(2))
   print(ham)

3. eggs = 0
   
   def spam(ham):
       eggs = ham
   
   spam(7)
   print(eggs)

4. def spam(eggs, ham):
       eggs = ham
       return ham
   eggs = 2
   ham = eggs + 1
   spam(eggs, ham)
   print(eggs)

5. spam = 1
   for i in range(5):
       spam = spam / i
   print(spam)

6. spam = 0
   for i in range(1, 5):
       spam = spam * i
   print(spam)
         

7. def spam(eggs):
       ham = 0
       if eggs % 2 == 0:
           ham = eggs
       return ham
   
   accumulator = 0
   for i in range(10):
       accumulator += spam(i)
         

Write a function called sum_range(start, end, step), which takes as input integers start, end and step. Your function should return the sum of all of the values in the specified range.

Write a function called lazy_increase(n), which returns \(2 \times n\) if n is odd and divisible by 3. It should return \(1.5 \times n\) if n is odd and not divisible by 3. It should return \(n\) in all other cases.