(log10)

(logand)

(log10 number)

Calculate the common logarithm.

This function returns the common logarithm with base 10 (log10 x). This function cannot take a negative number. The result is a real number.

Examples

Code	Returns
(log10 100)	2.0
(log10 50.65)	1.70458

NOTE The expt function is the opposite of the log10 function.