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JAVA-SCRIPT VARIABLE

(1)Variable example in javascript:
<html>
                <head>
               
                <script> 
                var x = 10;           
                var y = 20; 
                var z=x+y; 
                document.write(z); 
                </script> 
</head>
<body>
</body>
</html>

(2)Global variable example:

<html>
                <head>
                <script> 
                var data=200;//gloabal variable 
                function a(){ 
                document.writeln(data); 
                } 
                function b(){ 
                document.writeln(data); 
                } 
                a();//calling JavaScript function 
                b(); 
                </script>
                </head>
                <body>
                </body>
                </html>

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