IsBoolean  
Description
Determines whether a value can be converted to Boolean
 
Returns
True, if the parameter can be converted to Boolean; False, otherwise.
 
Category
Decision functions
 
Function syntax
IsBoolean(value)
 
See also
IsNumeric, YesNoFormat
 
Parameters
 
Parameter      Description
value Number or string
 
Example
<h3>IsBoolean Example</h3>

<cfif IsDefined("FORM.theTestValue")>
   <cfif IsBoolean(FORM.theTestValue)>
      <h3>The expression <cfoutput>#DE(FORM.theTestValue)#</cfoutput> is 
Boolean</h3>
   <cfelse>
      <h3>The expression <cfoutput>#DE(FORM.theTestValue)#</cfoutput> is not 
Boolean</h3>
   </cfif>
</cfif>

<form action = "isBoolean.cfm">
<p>Enter an expression, and discover whether it can be evaluated to a
Boolean value.

<input type = "Text" name = "TheTestValue" value = "1">
<input type = "Submit" value = "Is it Boolean?" name = "">
</form>
value  
Number or string