html
html
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<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
</body>
</html>
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css
css
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body {
}
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js
js
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x=prompt("Enter the number",10)||10
sum=0
for(i=0;i<x;i++){
sum+=(i+1)*(i+1)
}
alert(sum)
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