Python/Basic Python Programs/Program

Check Even or Odd

Check whether a given integer number is even or odd.

PythonBeginner

What You'll Learn

  • •Using the modulo operator (%)
  • •Understanding even and odd numbers
  • •Basic conditional statements (if-else)
  • •Type conversion with int()
Python
Try
# Program to check if a number is even or odd

num = int(input("Enter an integer: "))

if num % 2 == 0:
    print(num, "is even")
else:
    print(num, "is odd")

Output

Enter an integer: 7
7 is odd

Check Even or Odd in Python

This program demonstrates how to check if a number is even or odd using the modulo operator.

Understanding Even and Odd Numbers

  • Even numbers: Divisible by 2 (remainder is 0)

    • Examples: 2, 4, 6, 8, 10, 12...

  • Odd numbers: Not divisible by 2 (remainder is 1)

    • Examples: 1, 3, 5, 7, 9, 11...

Using the Modulo Operator

The modulo operator % returns the remainder of a division:

  • 5 % 2 returns 1 (5 divided by 2 leaves remainder 1)
  • 6 % 2 returns 0 (6 divided by 2 leaves remainder 0)

The Logic

python
if num % 2 == 0:
    print(num, "is even")
else:
    print(num, "is odd")

How it works:

  1. If num % 2 == 0, the number is even
  2. Otherwise, the number is odd

Key Takeaways

1
Modulo operator % returns the remainder
2

Even numbers have remainder 0 when divided by 2

3

Odd numbers have remainder 1 when divided by 2

4

This is a fundamental conditional logic pattern

Step-by-Step Breakdown

  1. 1Get an integer input from the user.
  2. 2Use modulo operator to check remainder when divided by 2.
  3. 3If remainder is 0, the number is even.
  4. 4Otherwise, the number is odd.
  5. 5Print the result.
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