# Function log10 Calculate the 10-base logarithm 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 | Complex | Array | Matrix | 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)