🎯 What you will learn
- Do math with + – * /
- Store numbers in variables
- Turn input into a number with int()
👋 Let’s get started!
Python can do math faster than any wizard 🧙. Let’s use it to count candy, split pizza and solve puzzles!
🪜 Step by step
1. ➕➖✖️➗ Math signs
Python uses + – * and / for math.
print(7 + 3)
print(10 - 4)
print(6 * 7)
print(20 / 4)2. 📦 Numbers in variables
Variables can hold numbers too — no quotes!
apples = 5
oranges = 3
print(apples + oranges)3. 🔢 int() for answers
input() gives text. Use int() to turn it into a number before doing math.
age = int(input("How old are you? "))
print(age + 1)🧪 Try it!
Change the code and press ▶ Run to see what happens. You can’t break anything!
Pizza party
slices = 12
friends = 4
print("Each friend gets", slices // friends, "slices 🍕")Candy counter
candy = 20
eaten = 5
left = candy - eaten
print(left)📖 Key words
Tap a card to flip it over!
- Integer
- A whole number like 7 🔢
- int()
- Turns text into a number 🔄
- //
- Divides and keeps the whole number ➗
🏆 Challenge
There are 3 boxes with 8 crayons each. Print the total number of crayons.
Challenge
boxes = 3
crayons_each = 8
Knowledge Check Quiz
- What does this print?
- What does this print?
- Why use int(input())?