int and float

Learn int and float types and conversions.

In Python numbers come in two basic types: int (integer) and float (decimal).

age = 25          # int
price = 19.99     # float

int holds whole numbers; Python has no integer limit (as long as memory allows). float is for decimal numbers.

When you mix the two, the result is usually a float: 5 + 2.0 gives 7.0. This is called automatic type conversion.

Large numbers and underscores

Python accepts underscores in large numbers to make them easier to read:

population = 7_900_000_000
budget = 1_250_000.50

The underscores are ignored by Python; the number has the same value. This works like a thousands separator and improves readability.

Scientific notation is also supported: 1e6 means one million (float).

Assign 100 (int) to count, assign 2.5 (float) to weight. Then print print(count, weight).

Show example solution

count = 100
weight = 2.5
print(count, weight)

Assign a decimal price

price = ____
print(price)

Show answer

price = 19.99
print(price)

Next lesson: bool