Even or odd checker

Client

Parity splits integers into even (divisible by 2) and odd—useful for loop bounds and bit tricks.

About Even or odd checker

Test whether an integer is even or odd—parity check in your browser. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

42 is even.

Nearby workflows on Toolcore

  • Even parity bit — Append even parity bit to 7-bit ASCII binary string. when units or numeric output should be checked on a related calculator.
  • Modulo calculator — Integer remainder and truncated quotient (a mod b)—BigInt math in your browser. when units or numeric output should be checked on a related calculator.
  • Prime number checker — Test whether a whole number is prime—BigInt trial division in your browser, no upload. when units or numeric output should be checked on a related calculator.
  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.

Common use cases

  • Quick parity check while debugging array indexes.
  • Intro discrete math exercises.

Common mistakes to avoid

  • Decimals

    Only integers are valid—2.0 is OK as integer, 2.5 is not.

FAQ

Zero?

Zero is even.

Large integers?

JavaScript safe integers only beyond ±2⁵³−1 may lose precision.

More tools

Related utilities you can open in another tab—mostly client-side.