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, IsValid, YesNoFormat
Parameters
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