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<!DOCTYPE html>
<html>
<head>
<meta charset = "UTF-8">
<title>Learn JavaScript. Arithmetic operators. Addition (plus +).</title>
</head>
<body>
<script>
var a = 4;
var b = 2;
var sum = a + b;
document.write (a + " + " + b + " = " + sum);
</script>
</body>
</html>0