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Lesson 9 of 20 · Logic
Logic — Part 17
True and false. Combine conditions. This is part 17 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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