Data Types

Python has several built-in data types.

Numbers

x = 42        # int
y = 3.14      # float
z = 2 + 3j    # complex

name     = "Alice"
greeting = f"Hello, {name}!"
multi    = """
line one
line two
"""

fruits = ["apple", "banana", "cherry"]
fruits.append("date")
print(fruits[0])   # apple
print(fruits[-1])  # date

person = {"name": "Alice", "age": 30}
print(person["name"])   # Alice
person["city"] = "NYC"  # add key

point = (10, 20)  # immutable
x, y  = point     # unpacking

unique = {1, 2, 3, 2, 1}
print(unique)  # {1, 2, 3}

type(42)       # <class 'int'>
isinstance(42, int)  # True