• 코드:
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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 Number Method</title>
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</head>
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​
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<body>
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​
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    <h1>Number.parseFloat() 메소드</h1>
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​
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    <script>
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        document.write(Number.parseFloat("12") + "<br>");           // 12
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        document.write(Number.parseFloat("12.34") + "<br>");        // 12.34
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        document.write(Number.parseFloat("12문자열") + "<br>");        // 12
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        document.write(Number.parseFloat("12 34 56") + "<br>");     // 12
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        document.write(Number.parseFloat("문자열 56"));                // NaN
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    </script>
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</body>
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​
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</html>