JavaScript DHTML/Data Type/typeof

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Output the type information

   <source lang="html4strict">

<html> <head> <title>A Simple Page</title> <script language="JavaScript"> var x = "Hello", y; alert("Variable x value is " + typeof(x)); alert("Variable y value is " + typeof(y)); alert("Variable z value is " + typeof(z)); </script> </head> <body> </body> </html> 

 </source>


Use typeof to check the type for different type variables

   <source lang="html4strict">

<html> <head> <title></title> </head> <body> <script type="text/javascript"> var num1 = 1; var num2 = 1; var num3 = 19; var value = "84"; var name1 = "A"; var name2 = "BB"; alert(typeof num1); alert(typeof num2); alert(typeof num3); alert(typeof value); alert(typeof name1); alert(typeof name2); </script> </body> </html> 

 </source>
Источник — «http://wbex.ru/index.php?title=JavaScript_DHTML/Data_Type/typeof&oldid=1747»