Global and Local Variable Scope Demonstration : Variable Definition « Language Basics « JavaScript DHTML






  1. JavaScript DHTML
  2. Language Basics
  3. Variable Definition

Global and Local Variable Scope Demonstration

  

<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
var globalVar = "Boy"   // global
var globalVar2 = "dog"        // global
function demo() {
    var globalVar2 = "cat"    // local version of globalVar2
    var output = globalVar2 + " does not belong to " + globalVar + ".<BR>"
    document.write(output)
}
</SCRIPT>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
demo();
document.write(globalVar2 + " belongs to " + globalVar + ".")
</SCRIPT>
</BODY>
</HTML>








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