Lesson 12 of 20 · Logic & Booleans

Logic & Booleans — Part 12

True, false, AND, OR, NOT.

What you'll learn

You will learn that comparisons produce True or False (booleans), and these power every decision in code.

Words to know

Boolean: A value that is either True or False.
Compare: Checking how two values relate: equal (==), greater (>), less (<).
Condition: Something that is true or false. Programs use conditions to make decisions.

Your turn

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Try it: run the code, then change it

1Computers think in True and False. a > 3 asks 'is 5 greater than 3?' — yes, so it's True.
2a > 10 asks 'is 5 greater than 10?' — no, so it's False. These True/False values are called booleans.
3Other comparisons: == (equal?), != (not equal?), < (less than?), >= (greater or equal?). They all give True or False.
4Booleans power every decision in code. Every 'if' statement checks a boolean. Every game checks: is the player alive? True or False!

Auto-run is on: change the code and the result updates by itself.

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Output

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Check your understanding · 1 of 5

What does == mean in Python?

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2 == 3 is:

Check your understanding · 3 of 5

10 < 20 is:

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What is a boolean?

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5 > 3 is:

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