Variable and Data Types

Immutable: int , float , str , tuple , frozenset , bool
Mutable: list , dict , set

A variable is a name that refers to a value. Python is dynamically typed, so you don't declare a type: the type belongs to the value.

name = "PrepVerse"   # str
year = 2025          # int
pi = 3.14159         # float
is_ready = True      # bool

Built-in data types

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

a = [1, 2, 3]
b = a          # same list object
b.append(4)
print(a)       # [1, 2, 3, 4]

int("10")      # 10
str(10)        # "10"
float("3.5")   # 3.5
list("abc")    # ['a', 'b', 'c']

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