ceil()这个函数是啥意思？

Question

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Answer 1

What does the ceil() function mean? -PHP Chinese website Q&A-What does the ceil() function mean? -PHP Chinese website Q&A

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Answer 2

你这样想把  ceil在英文里是天花板的意思  floor在英文里是地板的意思。所以 Math.ceil() 就是对一个数向上取整，Math.floor()就是对一个数向下取整  比如    $a  = 3.76;  $b = Math.ceil($a)    $b = 4  ;     $c = Math.floor($a);  $c = 3;