console 命令行工具 X clear

console

//1、如果有一个字符串"Rome was not built in a day"
//请用程序统计该字符串中字符个数，不允许使用字符串对象的length属性。
var str ="Rome was not built in a day";
      arr =str.replace(/\s/g);//去掉所有的空格
      var sum =0;
      for(var i of str)
      {
        sum++;
      }
      document.write(sum);

<!DOCTYPE html> 
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <style type="text/css">
            
        </style>
        <script>
        
        </script>
    </head>
    <body>
    </body>
</html>