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Lg Purpose Returns the base-2 logarithm of number. Format Lg(number) Parameters number - any numeric expression or field containing a numeric expression Data type returned number Originated in FileMaker Pro 7.0 Description Number can be any positive value. Negative values return an error. For 0, the Lg function returns nothing because this value is out of the acceptable range. Examples Lg(1) = 0 Lg(2) = 1 Lg(32) = 5 Related topics Functions reference (category list) Functions reference (alphabetical list) About formulas About functions Defining calculation fields Using operators in formulas