除法的运算
‘/’ 无论是否整除返回的都是 float ,暂且叫它精确除法
例如 : 10/5,的到的结果是 2.0
‘//’无论是否整除返回的都是 int ,而且是去尾整除
例如 :5//2,得到的结果是 2
要先导入模块 math
向上取整
math.ceil()
返回值为 int
向下取整
math.floor()
返回值为 int
内置函数 round()
返回值为 int
例子:
#encoding:utf-8import math#向上取整print "math.ceil---"print "math.ceil(2.3) => ", math.ceil(2.3)print "math.ceil(2.6) => ", math.ceil(2.6)#向下取整print "nmath.floor---"print "math.floor(2.3) => ", math.floor(2.3)print "math.floor(2.6) => ", math.floor(2.6)#四舍五入print "nround---"print "round(2.3) => ", round(2.3)print "round(2.6) => ", round(2.6)#这三个的返回结果都是浮点型print "nnNOTE:every result is type of float"print "math.ceil(2) => ", math.ceil(2)print "math.floor(2) => ", math.floor(2)print "round(2) => ", round(2)输出结果
问题:round函数有争论
链接:https://juejin.im/post/6844903810293301255?utm_source=gold_browser_extension