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Chapter 3: ColdFusion Functions
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
Содержание COLFUSION MX 7-CFML
Страница 1: ...COLDFUSION MX7 CFML Reference...
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Страница 101: ...cfdefaultcase 101 cfdefaultcase cfswitch cfoutput Your grade is grade cfoutput...
Страница 115: ...cfdocumentsection 115 cfdocumentsection cfoutput cfdocument...
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Страница 411: ...cftable 411 cftable body html...
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Страница 605: ...GetEncoding 605 WriteOutput The encoding is theEncoding cfscript cfif...
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Страница 751: ...LSDateFormat 751 hr noshade cfoutput cfloop...
Страница 861: ...StructFind 861 cfquery cfif cfoutput hr Employee Add Complete cfoutput cfcase cfswitch...
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