Variables

A variable is a name pointing to a value. In Python you don’t declare the type: just assign.

name = "Ana"
age = 30

Dynamic typing

The type comes from the value and can change:

x = 5        # int
x = "text"   # now str

Naming rules

• Start with a letter or _, never a number.
• Only letters, numbers, and _.
• Case sensitive: age ≠ Age.
• Convention: snake_case for variables.

my_age = 25   # good
2name = "x"   # error

Multiple assignment

a, b, c = 1, 2, 3
x = y = z = 0

Print values

name = "Ana"
print(name)
print("Name:", name)