typeof

Syntax:: typeof

The typeof operator is used to determine the type of a given expression. An integer is returned that defines the type.

There are five types recognized by WMLScript:

Type	Integer
Integer	0
Floating-point	1
String	2
Boolean	3
Invalid	4

This example tests two expressions; the first is a floating-point number and the second is division by zero which is invalid.

Examples

Code:

<?xml version="1.0"?>
 <!DOCTYPE wml
PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"

"http://www.WAPforum.org/DTD/wml_1.1.xml">

<wml>
 
 <card id="card1">

   <p>
    typeof
example
    </p>

   <do type="accept">

      <go
href="TypeofExample.wmls#findtypeof()" />

   </do>
 </card>
 

<card id="card2">
 <p>

   1st expression = $(expression1)

   <br />
    1st type
= $(typeinteger1)
    <br />

   2cd expression = $(expression2)

   <br />
    2cd type
= $(typeinteger2)
 </p>
 </card>


 </wml>

Explanation:

Code for TypeofExample.wml.

Language(s): WML

Code:

extern function
findtypeof()
 {
    var exp1 =
123.456;
    var int1 = typeof(exp1);

   WMLBrowser.setVar("expression1", exp1);

   WMLBrowser.setVar("typeinteger1", int1);

   var exp2 = 1/0;
    var
int2 = typeof(exp2);

   WMLBrowser.setVar("expression2", exp2);

   WMLBrowser.setVar("typeinteger2", int2);

   WMLBrowser.go("TypeofExample.wml#card2");

};

Explanation:

Code for TypeofExample.wmls.

Primary links

WMLScript » Operators » typeof

Examples

Code:

Explanation:

Language(s): WML

Code:

Explanation:

Language(s): WML

See Also: