Unit #5-03

Learning Outcome

At the end of this lesson, you will be able to:

• understand and create your own function that has return value

Review

• functions with parameters

Lesson

• go over  Return Values , Computer Based Problem Solving

  • now that we know how to use a return statement, we will no longer print out results in a function (like we have in the last few units) we will always return the value

  • NOTE: we have also added in "type hints", to help coders using your function

Activity

• nil

Daily Assignment

• create a program and a function that takes the grade level character (4, 3, 2, 1, R - see Ontario section here) and returns the middle percentage mark (just as an integer, no "%" on the return value)

• accept a character (in python a single length string) type (ex. 4 or R)  as a level and return an integer as the percentage

  • if "invalid" input is passed to the function, then return a "-1"

    • "-1" is commonly used as a return value that means there has been an error

• read Return Values , Computer Based Problem Solving

Extra

• recreate the same above program in C

  • use CS50's get_char