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Glossary · Phase 0 · Tools

Boolean

Also written: booleans, bool

A value that is either True or False.

A comparison asks a yes-or-no question, like a light switch that's either on or off. The answer is a boolean: True or False.

Try it now

Watch which lines the highlight visits. The first condition is False, so Python moves to the elif. That one is True, so it runs and the else is skipped entirely. Try it again in your head with ctr = 0.01.

Learn it properly

Decisions with if/else · Compare values and choose what happens next. About 20 minutes.

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