23 lines
458 B
Markdown
23 lines
458 B
Markdown
---
|
|
title: Number is power of ten
|
|
tags: math
|
|
author: chalarangelo
|
|
cover: boulder-beach
|
|
firstSeen: 2021-01-06T22:53:58+02:00
|
|
lastUpdated: 2021-01-06T22:53:58+02:00
|
|
---
|
|
|
|
Checks if the given number is a power of `10`.
|
|
|
|
- Use `Math.log10()` and the modulo operator (`%`) to determine if `n` is a power of `10`.
|
|
|
|
```js
|
|
const isPowerOfTen = n => Math.log10(n) % 1 === 0;
|
|
```
|
|
|
|
```js
|
|
isPowerOfTen(1); // true
|
|
isPowerOfTen(10); // true
|
|
isPowerOfTen(20); // false
|
|
```
|