Iteration Exercises

CSCI 1012

In-Lab Exercises

• File names:
  • last_digit.py
  • pizza_party.py
  • odd_string.py
• Turn in on the submit server for credit
• Turn in one .zip with all the .py files
  • Unlimited attempts, until 5 PM on Friday 20 Feb
  • We’ll provide solutions – pay attention!

Exercise 1

last_digit.py

def last_digit(x):
  if x % 10 == 0 or 1:
    return True
  else:
    return False

• Argument x will be a non-negative integer
• Function should return True if x’s last digit is 0 or 1
  • Otherwise, function should return False
• Something doesn’t work. Fix it!

Photograph of a Pizza Pie

Image copyright: Andy’s Pizza. Fair use.

Exercise 2

pizza_party.py

def pizza_party(people):
  slices_per_pie = 8
  pies = 1
  if (pies * slices_per_pie) % people == 0:
    return True
  return False

• Currently: returns True if one pie can be equally shared by the number of people
• Goal: return the minimum number of pies needed so the number of people can equally share the slices
  • pizza_party(2) returns 1
  • pizza_party(6) returns 3
  • pizza_party(5) returns 5

Exercise 3

odd_string.py

def odd_string(A):
  s = "" # create an empty string
  # use a for loop to iterate over odd numbers <= A
    # concatenate them with the string and reassign
    # you must account for the last digit "differently"
  return s

• odd_string(5) should return "1 3 5"
• odd_string(8) should return "1 3 5 7"