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Lesson 14 of 20 · Logic & Boolean Expressions
Logic & Boolean Expressions — Part 3
True, false, AND, OR, NOT. This is part 3 of 20.
What you'll learn
You will learn that comparisons produce True or False (booleans), and these power every decision in code.
Steps
- 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!
Key Terms
- 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.
Python 3
Output
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