Operators & Expressions

04 / 10 Part of python basic

➕ Topic 03 · Logic

Operators & Expressions

Master arithmetic, comparison, logical, and assignment operators to build meaningful expressions in every Python program.

⏱ ~30 min
🟢 Beginner
🧮 Math & Logic

Arithmetic Operators

Python supports all standard math operations plus integer division and exponentiation.

arithmetic.py

a, b = 10, 3

print(a + b)   # 13  — addition
print(a - b)   # 7   — subtraction
print(a * b)   # 30  — multiplication
print(a / b)   # 3.333... — true division
print(a // b)  # 3   — floor division
print(a % b)   # 1   — modulo (remainder)
print(a ** b)  # 1000 — exponentiation

Comparison Operators

Comparison operators return True or False and are the foundation of conditional logic.

comparison.py

x, y = 5, 10
print(x == y)   # False — equal
print(x != y)   # True  — not equal
print(x < y)    # True  — less than
print(x > y)    # False — greater than
print(x <= y)   # True  — less than or equal
print(x >= y)   # False — greater than or equal

Logical Operators

Combine boolean expressions with and, or, and not.

logical.py

is_adult    = True
has_ticket  = False

print(is_adult and has_ticket)  # False
print(is_adult or  has_ticket)  # True
print(not is_adult)              # False

Assignment Operators

x = 5

Basic assignment

x += 3

Add & assign → x = x + 3

x -= 2

Subtract & assign

x *= 4

Multiply & assign

x //= 2

Floor divide & assign

n := 10

Walrus (3.10+) — assign inside expression

Operator Precedence

Python follows standard math precedence: parentheses → exponents → multiply/divide → add/subtract.

precedence.py

result = 2 + 3 * 4          # 14 (not 20)
result = (2 + 3) * 4        # 20
result = 2 ** 3 ** 2        # 512 (right-associative)

💡 Best Practice

Use parentheses to make complex expressions clear — don't rely on readers memorising precedence rules.

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Operators & Expressions

Arithmetic Operators

Comparison Operators

Logical Operators

Assignment Operators

Operator Precedence