Is there an easy way to echo a float number with a specific amount of digits after the decimal point?
是否有一种简单的方法来回显小数点后具有特定位数的浮点数？
For example: $sum = 3.1234566768; I would like to echo $sum and get: 3.12.
例如：$ sum = 3.1234566768;我想回应$ sum并得到：3.12。
4 个解决方案
#1
30
use number_format()
使用number_format（）
number_format($sum,2);
#2
3
echo number_format($sum, 2); // 3.12
#3
2
Try with:
试试：
$sum = 3.1234566768;
$rounded = round($sum, 2);
#4
0
echo number_format((float)$ans, 4, '.', '');
I think this will work out
我想这会有用
#1
30
use number_format()
使用number_format（）
number_format($sum,2);
#2
3
echo number_format($sum, 2); // 3.12
#3
2
Try with:
试试：
$sum = 3.1234566768;
$rounded = round($sum, 2);
#4
0
echo number_format((float)$ans, 4, '.', '');
I think this will work out
我想这会有用