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<html><body><h1>JavaScript Operators</h1><h2>The typeof Operator</h2><p>Undefined and null are equal in value but different in type:</p><p id="demo"></p><script>document.getElementById("demo").innerHTML =typeof undefined + "<br>" +typeof null + "<br><br>" +(null === undefined) + "<br>" +(null == undefined);</script></body></html>