MACROMEDIA COLDFUSION MX 61-CFML, Reference

Page: 469 / 806

Exp 469
Exp
Description
Calculates the exponent whose base is e that represents number. The constant e equals
2.71828182845904, the base of the natural logarithm. This function is the inverse of
Log
, the
natural logarithm of
number
.
Returns
The constant e, raised to the power of number .
Category
Mathematical functions
Function syntax
Exp ( number )
See also
Log , Log10
Parameters
Usage
To calculate powers of other bases, use the exponentiation operator (^).
Example
<h3>Exp Example</h3>
<cfif IsDefined("FORM.Submit")>
<cfoutput>
<p>Your number, #FORM.number#
<br>#FORM.number# raised to the E power: #
exp(FORM.number) #
<cfif FORM.number LTE 0>
<br>You must enter a positive real number to see its natural logarithm
<cfelse><br>
The natural logarithm of #FORM.number#: #log(FORM.number)#
</cfif>
<cfif FORM.number LTE 0><br>
You must enter a positive real number to see its logarithm to base 10
<cfelse><br>
The logarithm of #FORM.number# to base 10: #log10(FORM.number)#
</cfif>
</cfoutput>
</cfif>
<cfform action = "exp.cfm">
Enter a number to see its value raised to the E power, its natural logarithm,
and the logarithm of number to base 10.
<cfinput type = "Text" name = "number" message = "You must enter a number"
validate = "float" required = "No">
<input type = "Submit" name = "Submit">
</cfform>
Parameter Description
number Exponent to apply to the base e