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<title>JavaScript Variable Declare and assign value</title>
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<pre> <!-- Use pre element for work document.writeln() method -->
<script type="text/javascript">
var a = "hello";
var b;
var c;
document.writeln("a : " + a);
document.writeln("b : " + b);
document.writeln("c : " + c);
</script>
</pre>
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