检查一个数字是否可以被 6 PHP 整除 [英] checking if a number is divisible by 6 PHP

问题描述

我想检查一个数字是否能被 6 整除，如果不能，我需要增加它直到它被整除.

I want to check if a number is divisible by 6 and if not I need to increase it until it becomes divisible.

我该怎么做?

推荐答案

if ($number % 6 != 0) {
  $number += 6 - ($number % 6);
}

模数 运算符给出除法，所以 $number % 6 是除以 6 时剩下的数量.这比循环并不断重新检查要快.

The modulus operator gives the remainder of the division, so $number % 6 is the amount left over when dividing by 6. This will be faster than doing a loop and continually rechecking.

如果减少是可以接受的，那么这会更快:

If decreasing is acceptable then this is even faster:

$number -= $number % 6;

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