Knowledge organisersData Types and Casting

Common data types

Knowledge organiser

Data Types and Casting

301.4a

int, real, bool, char, string.

What you need to know

Every value in Python has a data type. The most common are int (whole numbers), float (decimals), str (text), and bool (True/False). Use type() to check.

Key points

int: whole numbers like 5, -3
float: decimals like 3.14, -0.5
str: text in quotes like "hello"
bool: True or False
type() returns the data type of a value

Code examples

Data types

python

age = 15          # int
price = 9.99      # float
name = "Alice"    # str
passed = True     # bool
print(type(age))  # <class 'int'>