caseHalfAwayFromZero; // Round to the nearest integer. If the decimal part is5, round to the integer with the larger absolute value. caseHalfTowardsZero; // Round to the nearest integer. If the decimal part is5,
我假设PHP有一个floor函数：floor($num * 2) / 2应该这样做。你可以这样做，round($number / 5, ...
表示 小数点前任意位数 2 表示两位小数 格式后的结果为f 表示浮点型 方式四: NumberFormat ddf1=NumberFormat.getNumberInstance() ; void...round方法不能设置保留几位小数,我们只能象这样(保留两位): public double round(double value){ return Math.round( value * 100 )...,因为.025距离”nearest neighbor...
The optional number of decimal digits to round to. If the precision is positive, num is rounded to precision significant digits after the decimal point. If the precision is negative, num is rounded to precision significant digits before the decimal point, i.e. to the nearest multiple of ...
Round numbers up to the nearest integer: <?php echo(ceil(0.60) .""); echo(ceil(0.40) .""); echo(ceil(5) .""); echo(ceil(5.1) .""); echo(ceil(-5.1) .""); echo(ceil(-5.9)); ?> Try it Yourself » Definition and Usage The ceil...
在PHP中向下舍入到最接近的半整数一个简单的解决方案是使用模运算符（fmod()函数），如下所示：...
php 四舍五入到最接近的50或00的最简单方法第二个参数是四舍五入的小数位数，负值放在"一"位的左边...
The better way to round up/down to the nearest hundred (or thousand, etc.) is with roundBetter(): <?php // This function is backwards compatible with round(), // but provides an optional extra argument which, // if set and not null, allows you to override the default // ro...
Both ceil() and floor() take just one parameter - the number to round. Ceil() takes the number and rounds it to the nearest integer above its current value, whereas floor() rounds it to the nearest integer below its current value. Here is an example: ...
<?php $number = 0.49999999999999994; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); $number = 1.4999999999999998; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); $number = 4503599627370495.5; var_dump($number, round($number, 0, PHP_ROUND_HALF_UP)); Resulted ...