Quest 1 • Lesson 4
⚡ Conditional Statements (if / elif / else)
Conditional statements let your program make decisions. They execute different code based on whether a condition is True or False.
"Without conditionals, every program would run the same way every time. Conditionals add intelligence."
if_demo.py
age = 18
if age >= 18:
print("You are an adult")
if age >= 18:
print("You are an adult")
🧠 The `if` Statement
if– keyword that starts a conditional block.age >= 18– condition (comparison using==,!=,>,<,>=,<=).- Indentation – the code block under
ifMUST be indented (4 spaces).
if_else.py
temperature = 30
if temperature > 25:
print("It's hot outside")
else:
print("It's cool outside")
if temperature > 25:
print("It's hot outside")
else:
print("It's cool outside")
elif_demo.py
score = 85
if score >= 90:
print("Grade: A")
elif score >= 80:
print("Grade: B")
elif score >= 70:
print("Grade: C")
else:
print("Grade: F")
if score >= 90:
print("Grade: A")
elif score >= 80:
print("Grade: B")
elif score >= 70:
print("Grade: C")
else:
print("Grade: F")
🔁 elif – Multiple Conditions
elif= else if – checks another condition if the previous ones were false.- You can have as many
elifblocks as needed. - The
elseblock is optional and runs if all conditions are false.
✨ Challenge: Number Classifier
Write a program that takes a number (store in a variable). Print:
- "Positive" if number > 0
- "Negative" if number < 0
- "Zero" if number == 0
# Number classifier
num = 5 # change this value to test
if num > 0:
print("Positive")
elif num < 0:
print("Negative")
else:
print("Zero")
💡 Try changing the value of num to -3, 0, 10 and see the output.
🧪 Live Mental Playground
What would this code print?
x = 7
if x % 2 == 0:
print("even")
else:
print("odd")
if x % 2 == 0:
print("even")
else:
print("odd")
Reveal answer
Output: odd (because 7 % 2 == 1, so the else block runs)
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Next lesson: Loops (for/while) – repeat actions efficiently.
Continue to Lesson 1.5 →(Coming soon – check back or buy Pro Pack for instant access)