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<title>JavaScript function returning a value</title>
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<pre> <!-- Use pre element for work document.writeln() method -->
<script type="text/javascript">
function cal(radius ){
var area;
area = 3.14 * radius * radius;
return area;
}
var radius = 2.0, circle_area;
circle_area = cal(2.0);
document.writeln("Radius of Circle : " + radius);
document.writeln("Area of Circle : " + circle_area);
</script>
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