# LOG10

Returns the base-10 logarithm of a number.

## Syntax

LOG10(<number>)


### Parameters

Term Definition
number A positive number for which you want the base-10 logarithm.

## Return value

A decimal number.

## Remarks

The LOG function lets you change the base of the logarithm, instead of using the base 10.

## Example

The following formulas return the same result, 2:

= LOG(100,10)
= LOG(100)
= LOG10(100)