• 코드:
​x
 
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<!DOCTYPE html>
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<html lang="ko">
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​
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<head>
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    <meta charset="UTF-8">
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    <title>JavaScript Iteration Statement</title>
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</head>
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​
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<body>
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​
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    <h1>for / in 문</h1>
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​
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    <script>
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        var obj = {
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            name : "이순신",
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            age : 20
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        };
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​
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        for (var i in obj) {
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            document.write(i + "<br>");
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        }
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    </script>
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</body>
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​
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</html>