Description

Determines the value of a character.

Returns

The value of the first character of a string; if the string is empty, returns zero.

Category

String functions

Function syntax

Asc(string)

See also

Chr

History

ColdFusion MX: Changed Unicode support: ColdFusion supports the Java UCS-2 representation of Unicode characters, up to a value of 65536. (Earlier releases supported 1-255.)

Parameters

Example

<h3>Asc Example</h3>
<!--- If the character string is not empty, output its ASCII value. --->
<cfif IsDefined("FORM.charVals")>

    <cfif FORM.charVals is not "">
        <cfoutput>#Left(FORM.charVals,1)# = 
 #Asc(FORM.charVals)#</cfoutput>
    <cfelse>
<!--- If it is empty, output an error message. --->
        <h4>Enter a character</h4>
    </cfif>
</cfif>

<form action = "asc.cfm" method=post>
    <p>Enter a character to see its ASCII value
    <br><input type = "Text" name = "CharVals" size = "1" maxlength = "1"></p>
    <p><input type = "Submit" name = ""> <input type = "RESET"></p>
</form>