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<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><script>let res = "";res += Number.isFinite(5-2) + ": 5-2<br>";res += Number.isFinite(5/2) + ": 5/2<br>";res += Number.isFinite(0) + ": 0<br>";res += Number.isFinite(0/0) + ": 0/0<br>";res += Number.isFinite(Infinity) + ": Infinity<br>";res += Number.isFinite(-Infinity) + ": -Infinity<br>";res += Number.isFinite(NaN) + ": NaN<br>";document.getElementById("demo").innerHTML = res;</script></body></html>