IsBoolean(value)

Description

Returns TRUE if value can be converted to a Boolean; otherwise, FALSE.

Category

Decision functions

See also

IsNumeric, YesNoFormat

Parameters

Parameter
Description
value
 A number or string

Example 

<!--- This example shows the use of IsBoolean --->
<html>
<head>
<title>
IsBoolean Example
</title>
</head>

<body bgcolor = silver>
<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" method = "POST">
<P>Enter an expression, and discover if
it can be evaluated to a Boolean value.

<input type = "Text" name = "TheTestValue" value = "1">
<input type = "Submit" value = "Is it Boolean?" name = "">
</FORM>
</body>
</html>