JS保留兩位小數例子 四捨五入使用函數toFixed()
<html>
<head>
</head>
<script language="javascript">
document.write("<h1>JS保留兩位小數例子</h1><br>");
var a=2.1512131231231321;
document.write("原來的值："+a+"<br>");
document.write("兩位小數點:"+a.toFixed(2)+"<br>四位小數點"+a.toFixed(4));
</script>
<body>
</body>
</html>
php保留兩位小數例子 四捨五入
1.number_format
$number = 1234.5678;
$nombre_format_francais = number_format($number, 2, ,, );
// 1 234,57
$english_format_number = number_format($number, 2, ., );
// 1234.57
2.round
$number = 1234.5678;
echo round($number ,2);
//1234.57
3.sprintf
$formatted = sprintf ("%s有￥%01.2f。",$name, $money);
echo $formatted;
//張三有￥123.10。
