mathjs/docs/reference/functions/log10.md

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

# Function log10

Calculate the 10-base of a value. This is the same as calculating `log(x, 10)`.

For matrices, the function is evaluated element wise.


## Syntax

```js
math.log10(x)
```

### Parameters

Parameter | Type | Description
--------- | ---- | -----------
`x` | Number | BigNumber | Boolean | Complex | Array | Matrix | null |  Value for which to calculate the logarithm.

### Returns

Type | Description
---- | -----------
Number | BigNumber | Complex | Array | Matrix |  Returns the 10-base logarithm of `x`


## Examples

```js
math.log10(0.00001);            // returns -5
math.log10(10000);              // returns 4
math.log(10000) / math.log(10); // returns 4
math.pow(10, 4);                // returns 10000
```


## See also

[exp](exp.md),
[log](log.md)


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