Variables

A variable stores a value so you can use it later. You create one by assigning a value with =.

Example

name = "Alex"
age = 16
gpa = 3.7
is_student = True

Use Variables

print(name)
print(age + 1)

Update a Variable

score = 10
score = score + 5
score += 2

Naming Rules

• Use letters, numbers, and underscores.
• Start with a letter or underscore, not a number.
• Use snake_case: first_name, total_score.
• Names are case-sensitive: Score and score are different.

Multiple Assignment

x, y, z = 1, 2, 3

Swap Values

a = 5
b = 9
a, b = b, a