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<html lang="ko">

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	<meta charset="UTF-8">
	<title>JavaScript Predefined Function</title>
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<body>

	<h1>isNaN() 함수</h1>

	<script>
		document.write(isNaN(123) + "<br>");
		document.write(isNaN(123e100) + "<br>");
		document.write(isNaN(0) + "<br>");
		document.write(isNaN(true) + "<br>");
		document.write(isNaN(false) + "<br>");
		document.write(isNaN(null) + "<br>");
		document.write(isNaN("123") + "<br>");
		document.write(isNaN("") + "<br>");
		document.write(isNaN("문자열") + "<br>");
		document.write(isNaN(undefined) + "<br>");
		document.write(isNaN(NaN));
	</script>
	
</body>

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