floor function meaning in English

地板函数

The div operator performs floating - point division , the mod operator returns the remainder from a truncating division . the floor function returns the largest closest to positive infinity number that is not greater than the argument and that is an integer . the ceiling function returns the smallest closest to negative infinity number that is not less than the argument and that is an integer
Div运算符做浮点除法运算, mod运算符做求余运算, floor函数返回不大于参数的最大整数趋近于正无穷, ceiling返回不小于参数的最小整数趋近于负无穷