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<!DOCTYPE html> <html> <body> <h1>JavaScript Numbers</h1> <h2>The Number.isFinite() method</h2> <p>Number.isFinite() returns true if the value is a finite, legal number:</p> <p id="demo"></p> <p>Number.isFinite() is not supported in Internet Explorer.</p> <script> let result = Number.isFinite("123"); document.getElementById("demo").innerHTML = result; </script> </body> </html>
