Even or Odd Checker

How it works

1. 1Enter any whole number — positive, negative, or zero — into the input field.
2. 2The tool truncates the value to a whole number, then checks whether it is divisible by 2 (remainder = 0).
3. 3A number is even when it ends in 0, 2, 4, 6, or 8; any other last digit means it is odd.

Use cases

• Quickly verify parity in homework or coding exercises without manual division.
• Teaching students the concept of even and odd numbers with instant feedback.
• Validating index logic — even/odd checks are common in algorithms and loops.

Frequently asked questions

Is zero even or odd?

Zero is even. It is divisible by 2 with no remainder (0 ÷ 2 = 0), so it satisfies the definition of an even number.

What happens if I enter a decimal like 3.7?

The input is truncated toward zero to a whole number first (3.7 → 3), then the parity check is applied.

Are negative numbers even or odd?

Yes — parity applies to all integers. −4 is even (−4 ÷ 2 = −2, remainder 0) and −7 is odd.