Weird behavior in referring to global variable. Is this a bug in javascript? Surely it isn't!
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by Chandan .
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Published on 2009-02-25T12:06:15Z
Indexed on
2010/05/27
0:21 UTC
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Filed under:
JavaScript
|variables
Consider the following piece of code.
<html>
<body>
<script>
var x = 5; //globally declared
function showX()
{
alert("x="+x); //trying to display global value
var x=10; //trying to create and initialize a local x
}
</script>
<input type = "button" value="Show X" onclick="showX()">
</body>
</html>
The alert statement shows 'x=undefined'. And doesn't print the global value of x as expected. An equivalent java code would display 5! So, is it a bug? If not then how does one explain that behavior?
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