#include <MsgBoxConstants.au3>
Example()
Func  Example()
; Assign a Local variable the natural logarithm of 1000.
Local $fLog1= Log (1000)
; Display the result.
MsgBox ($MB_SYSTEMMODAL,"",$fLog1)
; Assign a Local variable the base-10 natural logarithm of 1000.
Local $fLog2=  Log10(1000)
; Display the result.
MsgBox ($MB_SYSTEMMODAL,"",$fLog2)
EndFunc ;==>Example
; User-defined function for common log
Func  Log10($fNb)
Return Log ($fNb)/ Log (10); 10 is the base
EndFunc ;==>Log10