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<html><body><h2>JavaScript Numbers</h2><p>If you use NaN in a mathematical operation, the result will also be NaN:</p><p id="demo"></p><script>let x = NaN;let y = 5;document.getElementById("demo").innerHTML = x + y;</script></body><!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_numbers_nan_math by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 16:49:19 GMT --></html>