JS, how to determine whether a number is a decimal? If it is a decimal, how to judge it is a few decimal??

Source: Internet
Author: User

<script type="text/javascript">

     var x = 4.23323; //测试的数字      var y = String(x).indexOf( "." ) + 1; //获取小数点的位置      var count = String(x).length - y; //获取小数点后的个数      if (y > 0) {          alert( "这个数字是小数,有" + count +  "位小数" );      else {          alert( "不是小数" );      } </script>

JS, how to determine whether a number is a decimal? If it is a decimal, how to judge it is a few decimal??

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