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Working with Formulas > Functions Used in Formulas > Numeric Functions > Log()


LOG() returns the logarithm of a number in the specified base. If no base is specified, LOG() uses a default base of ten. If the input is invalid, the function returns zero.



Function Format


LOG(number [, base]) 



Return Value


LOG() returns a numeric value 





LOG(10) = 1 


LOG(10, 2) = 3.3219 


LOG(1024, 2) = 10 


LOG(1, 0) = 0