Python 之 向上取整、向下取整以及四舍五入函数

python 向上取整ceil 向下取整floor 四舍五入round，下面给出源码示例.

import 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 "\n\nNOTE: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)