Python Even or Odd Number Checker

Determine if an integer is even or odd using the modulo arithmetic operator in Python.

Try Python Even or Odd Number Checker Code

How it Works

An even number is an integer that is exactly divisible by 2. An odd number leaves a remainder of 1 when divided by 2.

We use the Python modulo operator `%`, which returns the remainder of a division. For any even number, `n % 2` evaluates to `0`.

This classic computer science concept is widely used in looping, partitioning data, and basic algorithm design.

Source Code

Function to evaluate odd/even status for negative, positive, and zero integers.

even_odd.py

Try in Editor

def is_even(num):
    return num % 2 == 0

numbers = [4, 7, 0, -3]
for n in numbers:
    result = "Even" if is_even(n) else "Odd"
    print(f"{n:2d} is {result}")

Terminal Output

 4 is Even
 7 is Odd
 0 is Even
-3 is Odd

Real-world Applications

Alternating row colors in tables/UIs
Distributing tasks across multiple worker processes
Mathematical number theory puzzles

Frequently Asked Questions

Is 0 even or odd?

Zero is even because it leaves a remainder of 0 when divided by 2 (0 = 2 * 0).

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