请问是否正确

来源：3-18 编程练习

蛤小蛤

2019-06-07 15:27:01

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title>数据类型转换</title>
</head>
<body>
<script>
      // 补充代码
      var a_1 = "50px",
        a_2 = "px50",
        a_3 = "50px50",
        a_4 = "50.51";
      document.write(parseInt(a_1));
      document.write(parseInt(a_2));
      document.write(parseInt(a_3));
      document.write(parseInt(a_4));
    </script>
</body>
</html>

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