Reference > Functions reference > Number functions > Log
 

Log

Returns the base-10 (common) logarithm of a number.

Format 

Log ( number )

Parameters 

number - any positive numeric expression or field containing a numeric expression

Data type returned 

number

Originated in 

FileMaker Pro 6.0 or earlier

Description 

Number can be any positive value. Negative values return an error. For 0, the Log function returns nothing because this value is out of the acceptable range.

Equation

Example 1 

Log(1) returns 0.

Log(100) returns 2.

Related topics 

Functions reference (category list)

Functions reference (alphabetical list)

About formulas

About functions

Defining calculation fields

Using operators in formulas