Chapter 3a - Conditionals

if / elif / else

Branch with if, elif, and else. Conditions are boolean expressions.

var hp = 3
if hp <= 0:
    print("down")
elif hp < 5:
    print("low")
else:
    print("ok")

🧪 Try it

Mini quiz — branches

Quiz

Conditionals

1 / 2

What does this print when score is 10?

if score >= 10:
    print("A")
else:
    print("B")

Pick an answer to see if you are right.

Comparison operators

Op	Meaning
==	equal
!=	not equal
< <= > >=	ordering
and or not	boolean logic

var alive = hp > 0 and not stunned

🧪 Try it

Challenge: grade letter

Write letter(score) so it returns:

• "A" if score ≥ 90
• "B" if score ≥ 80
• "C" otherwise

Hidden tests call your function with different scores.

Indentation

Indent with 4 spaces. Click Reset if an old draft looks flat.

🧪 Practice with different scores

Exercises

Build up: parity → HP band → combat gate with boolean logic.

Activity: Even or odd

Write parity(n) so it returns "even" when n % 2 == 0, otherwise "odd".

odd