Lesson 32 of 79 · 15 minutes
Counting by steps and backwards: Rocket Countdown
Run the launch countdown. range() can start anywhere, skip numbers, and even count backwards.
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What you'll learn
- Choosing where to start
- Counting in steps
- Counting backwards
- Looping over letters
- A loop that never runs
Each idea opens with a short narrated video, about 2 minutes in all. Then you put it to work in the game.
The six levels
- Later Start Change it
- Every Second Light Copy and type
- Liftoff! Fill the gap
- Paint the Name Write it
- Silent Countdown Fix it
- Any Countdown Boss level
The levels go from changing one word, to writing the code on your own. The boss level changes every time you play.
New to Python? Start with the free games in Module 1.