# Number is power of ten

JavaScript, Math · Jan 6, 2021

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`

.

`const isPowerOfTen = n => Math.log10(n) % 1 === 0;`

```
isPowerOfTen(1); // true
isPowerOfTen(10); // true
isPowerOfTen(20); // false
```