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Write a JavaScript program to calculate area of circle.(3.14*r*r).
CODING:
<! DOCTYPE html>
<html>
<head>
<title>Write s JvaScript to display ADD.,SUB.,MULTI.,DIVED.
</title>
<script type="text/javascript">
{
  var r=prompt("Enter The Value OF R.=")
 document.write("<h1>",  "CALCULATE AREA OF CIRCLE=",  3.14*r*r, "</h1>");
}
</script>
</head>

 </html>

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