log From AutoCad AutoLISP Functions previous page next page load_dialog L Functions logand AutoLISP Reference Guide > AutoLISP Functions > L Functions > log Returns the natural log of a number as a real number (log num) Arguments num A positive number. Return Values A real number. Examples Command: (log 4.5) 1.50408 Command: (log 1.22) 0.198851 previous page start next page