CFLib.org – Common Function Library Project

Description:
This UDF will check to see if a submitted alpha character is Upper or Lower Case.

Return Values:
Returns either "upper", "lower", or "Not Alpha".

Example:

<cfoutput>
isUpperLower('U') = #isUpperLower('U')#<br>
isUpperLower('d') = #isUpperLower('d')#<br>
isUpperLower('F') = #isUpperLower('F')#<br>
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Checks to see if a submitted letter is Upper or Lower Case.
 * 
 * @param character      The character to check. (Required)
 * @return Returns either "upper", "lower", or "Not Alpha". 
 * @author Larry Juncker (larry@aljnet.net) 
 * @version 1, November 20, 2005 
 */
function isUpperLower(character) {
    if(asc(character) gte 65 and asc(character) lte 90) return "upper";
    else if(asc(character) gte 97 and asc(character) lte 122) return "lower";
     return "Not Alpha"; 
}