I don't know how or why it took me so long to need this, but I only recently discovered the need to determine whether or not a number was even or odd. It uses the less-common remainder operator `%`.

Since all even numbers are divisible by 2 with no remainder, you can test whether a number is even with the following, where `n` is the number you'd like to test:

```
const isEven = (n) => (n % 2 === 0) ? true : false;

console.log( isEven(8) ) // output: true
console.log( isEven(9) ) // output: false
```

## CodePen Example
Check out the CodePen below for more information and review the MDN docs [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder).

[Codepen Embed 1](https://codepen.io/shottsn/pen/dyVxWKw)

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How to Calculate if a Number is Odd or Even in JavaScript