For what and how is used "x % 2 == 0" in JavaScript i will be happy if you tell me Have a nice day!
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2Does this answer your question? [Testing whether a value is odd or even](https://stackoverflow.com/questions/6211613/testing-whether-a-value-is-odd-or-even) – lawrence-witt Jan 14 '21 at 21:16
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It checks if a value is even. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder – β.εηοιτ.βε Jan 14 '21 at 21:16
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`%` is the modulo operator and it performs remainder division. if you know whether a division operation results in a remainder, you can deduce whether a number is even or odd if you do the division by 2 and check for a remainder of `0`. – Scott Marcus Jan 14 '21 at 21:16
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Welcome to SO! This problem is covering topics that are probably already very well represented on the site and could most likely have been discovered with some prior research; as such I imagine it may be closed. As some guidance: [`%` is the remainder operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder) and [`==` is a weak equality check](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality). As such, this code is checking if the variable `x` divided by `2` leaves a remainder of `0` (evenly divides). – Alexander Nied Jan 14 '21 at 21:18
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As a new user, I'd recommend visiting the [ask] help page for tips on forming your questions. Good luck, and happy coding! – Alexander Nied Jan 14 '21 at 21:20
1 Answers
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To check if number x is even.
x % 2 === 1
checks if it is odd.
It uses a modulo (reminder) operator https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder
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croraf
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2This is such a basic syntax question that it really shouldn't be answered. A comment will suffice as the question will likely be closed. – Scott Marcus Jan 14 '21 at 21:17
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1Not when the question is poor because it will just attract more poor questions. – Scott Marcus Jan 14 '21 at 21:19