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

Decision Functions

isBinary isValid

IsNumeric(string)

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

<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"> 
Enter a string, and find out whether it can be evaluated to a numeric value. 
 
<input type = "Text" name = "TheTestValue" value = "123">  
<input type = "Submit" value = "Is it a Number?" name = ""> 
</form>