JS保留两位小数 四舍五入函数toFixed()
<html>
<head>
</head>
<script language="javascript">
document.write("<h1>JS保留两位小数例子</h1><br>");
var a=2.1512131231231321;
document.write("原来的值:"+a+"<br>");
document.write("两位小数点:"+a.toFixed(2)+"<br>四位小数点"+a.toFixed(4));
</script>
<body>
</body>
</html>
php保留两位小数例子 四舍五入
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;
//张三有¥123.10。
网站来源:http://www.okajax.com/a/200910/toFixed.html