Week 3: Python Getting Mathematical

Review

• User-defined functions, parameters
• Variables

Discussion

• Conditions
  o If statement: specify code to be executed, if a condition is true
  o Conditions allow for various possible paths in a program
  o Conditions are either True or False
  3 < 5 4 > 7 x == 10 x > 10 (2 * x) > 20
  if condition:
  perform
  task
• User input
  o Programs interact with the user
  ▪ Buttons, Passwords, Mouse clicks
  o Take information provided by the user to create a custom output.
  o Conditions (if statements) are a common application of user input, since we can
  create programs that provide output based on what is true or false about the
  input.
  Sample program – User input and conditions
  col = input(“What colour snowflake should I make?”)
  if col == “blue”:
  snowflake(“blue”)
  if col == “red”:
  snowflake(“red”)

Lesson

1. Create shapes and define their code within user-defined functions. Produce
   varying outputs (i.e. different sizes and colours) by passing in different values as
   parameters.
2. Utilize conditions (if statements) and user input to create shapes based on the
   information provided by the user.