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<!DOCTYPE html> <html> <body> <h1>JavaScript Numbers</h1> <h2>The Number.isNaN() Method</h2> <p>Is "Hello" NaN?</p> <p id="demo"></p> <p>Number.isNaN() is not supported in Internet Explorer.</p> <script> let text = "Hello"; document.getElementById("demo").innerHTML = Number.isNaN(text); </script> </body> </html>
