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<html><body><h1>JavaScript Numbers</h1><h2>The Number.isNaN() Method</h2><p>Number.isNaN() returns true if the value is Number.NaN (Not a Number), otherwise false.</p><p id="demo"></p><script>let result ="Is 5-2 NaN? " + Number.isNaN(5-2) + "<br>" +"Is 0 NaN? " + Number.isNaN(0) + "<br>" +"Is 'Hello' NaN? " + Number.isNaN('Hello') + "<br>" +"Is '2005/12/12\ NaN? " + Number.isNaN('2005/12/12') + "<br>" +"Is ' ' NaN? " + Number.isNaN('');document.getElementById("demo").innerHTML = result;</script></body></html>