Data Type Validation vs. Data Value Validation 

<cftry>
	<cfparam
		name="FORM.user_id"
		type="numeric"
		default="0"
		/>
 
	<!--- Catch TYPE validation error. --->
	<cfcatch>
		<cfset FORM.user_id = 0 />
	</cfcatch>
</cftry>

For Cut-and-Paste