CFML Reference
ColdFusion Functions

IsNumeric

Description

Determines whether a string can be converted to a numeric value. Supports numbers in U.S. number format. For other number support, use LSIsNumeric.

Return value

True, if string can be converted to a number; otherwise, False.

Category

Decision functions

Syntax

IsNumeric(string) 

See also

IsBinary

Parameters

Parameter	Description
string	A string or a variable that contains one.

Example

<h3>IsNumeric Example</h3>
<cfif IsDefined("FORM.theTestValue")>
  <cfif IsNumeric(FORM.theTestValue)>
  <h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput> can be 
converted to a number</h3>
  <cfelse>
  <h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput> cannot be 
converted to a number</h3>
  </cfif>
</cfif>

<form action = "isNumeric.cfm">
<p>Enter a string, and find out whether it can be evaluated to a numeric value.

<p><input type = "Text" name = "TheTestValue" value = "123"> 
<input type = "Submit" value = "Is it a Number?" name = "">
</form>

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