Module 6: Writing Your Own Functions

Organise code into reusable pieces. 9 Python coding games, each with short narrated videos and six levels.

This module is part of the full course. Unlock all 79 games for $9, or try Module 1 free.

1. 38 Your first function: def and calling · Dance Floor
   Teach a dancer a named routine. Then just call its name whenever you want it.
2. 39 How functions run · Relay Race
   Pass the baton from function to function, and watch the code jump in and come back.
3. 40 Parameters: giving a function information · Pizza Oven
   One function can serve every order. You just tell it what's on the pizza.
4. 41 Several inputs, defaults and names · Coffee Bar
   Every customer wants something different. One function with a few options can handle them all.
5. 42 return: getting an answer back · Vending Machine
   Money goes in, change comes back out. A function can hand an answer back to your program.
6. 43 print versus return · Quality Check
   Inspector functions check each product. Only a returned answer ever reaches the sorting arm.
7. 44 Scope: where variables live · Hotel Rooms
   Each function is a room. Whatever is left in a room can't be reached from the corridor, unless it's handed out.
8. 45 Splitting a program into functions · Assembly Line
   A messy machine gets split into clean stations, each a function with its own job and its own test.
9. 46 Project: Calculator · Calculator
   Your fourth real program: a working calculator, with a menu, and one function for each operation.