Skip to main content

Variables and Data Types

Variables are containers for storing data values. Python has no command for declaring a variable; it is created the moment you first assign a value to it.

x = 5
y = "John"
print(x)
print(y)

Built-in Data Types​

In programming, data type is an important concept. Variables can store data of different types, and different types can do different things. Python has the following data types built-in by default:

  • Text Type: str
  • Numeric Types: int, float, complex
  • Sequence Types: list, tuple, range
  • Mapping Type: dict
  • Set Types: set, frozenset
  • Boolean Type: bool

Examples of Data Types​

# String
greeting = "Hello World"

# Integer
age = 20

# Float
price = 19.99

# List (ordered and changeable)
fruits = ["apple", "banana", "cherry"]

# Tuple (ordered and unchangeable)
coordinates = (10, 20)

# Dictionary (key-value pairs)
person = {"name": "John", "age": 36}

# Boolean
is_active = True