Unit 2: Making Choices
Teach your code to decide.
Unit 2 of 31 in Python for kids. Its 5 lessons are True or False, If / Else, And, Or, Not, Bug Squashing and Bouncer Bot — below is everything each one explains, and a question or two from it to try.
Every sample on this page was run through real Python before it shipped, and prints exactly what it says it prints.
This unit is free for ever, because the first two units of every track are. Try it in the app.
⚖️ True or False
Questions with only two answers
Some questions can only be True or False. Python compares things with > (bigger), < (smaller) and == (the same).
Python
print(5 > 3)
print(2 == 4)It prints
True False
Try it yourself
What does print(10 > 20) show?
- True
- False
- 10
- Error
Which one asks "are these the same?"
- =
- ==
- >
- !
Answer them in the app
🔀 If / Else
Do this, otherwise do that
if runs code only when something is True. else covers every other case. The indented lines underneath belong to that branch — the spaces matter in Python!
Python
age = 7
if age > 10:
print("Big kid")
else:
print("Little kid")It prints
Little kid
Try it yourself
What does this print?
Python
coins = 12
if coins > 10:
print("Rich!")
else:
print("Keep saving")- Rich!
- Keep saving
- both lines
- nothing
What is missing at the end of the if line?
Python
if rain == True
print("Take a coat")- a colon :
- a semicolon ;
- a full stop .
- nothing
Answer them in the app
🔗 And, Or, Not
Asking two things at once
and is True only when both sides are True. or is True when at least one side is.
Python
print(True and False)
print(True or False)It prints
False True
Flipping an answer over
not turns True into False and False into True.
Python
print(not True)
print(not 5 > 10)It prints
False True
Try it yourself
What does this print?
Python
age = 12
print(age > 10 and age < 15)What does this print?
Python
rain = True
coat = False
print(rain and coat)Answer them in the app
🐛 Bug Squashing
Everybody writes bugs
A bug is a mistake in code. Real programmers write them all day long — the skill is reading the error and fixing it. Python usually tells you which line went wrong.
Try it yourself
Python says: IndentationError. What does that mean?
- A word is spelled wrong
- The spaces at the start of a line are wrong
- You used too many numbers
- The file is too long
Answer it in the app
🏆 Bouncer Bot
Try it yourself
What does this print?
Python
n = 15
if n > 10:
print("big")
else:
print("small")What does elif mean?
Python
if x > 10:
print("big")
elif x > 5:
print("medium")
else:
print("small")- Stop the program
- Else-if: try another question when the one above was False
- Repeat the code
- End of the file
Answer them in the app