How do I work with logarithms?
The log() function returns the natural logarithm of its single numeric parameter:
<cfset testVar = log(100)>
<cfoutput>#testVar#</cfoutput>
4.60517018599
The exp() function is the inverse of the log() function:
<cfset testVar = exp(4.60517018599 )>
<cfoutput>#testVar#</cfoutput>
100
The log10() function returns the logarithm of its single numeric parameter to base 10:
<cfset testVar = log10(100)>
<cfoutput>#testVar#</cfoutput>
2
This question was written by Jeremy Petersen
It was last updated on January 23, 2006.