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<html lang="ko">

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

<body>

	<h1>eval() 함수</h1>

	<script>
		var x = 10, y = 20;
		var a = eval("x + y");
		var b = eval("y * 3");
		document.write(a + "<br>" + b);
	</script>
	
</body>

</html>