# 1.函数:round # 2.功能:用于返回数值经四舍五入规则处理后的值 # 3.语法:round(number[, ndigits=None]) # 4.参数: # 4-1、number:必须参数,表示需要进行四舍五入规则操作的数值 # 4-2、ndigits:可选参数,表示小数点后保留的位数,可为任意整数值(正数、零或负数) # 4-2-1、若不提供ndigits...
这里的函数round(float numeral, remained decimals number)指的是向0方向进行四舍五入运算。这里均为保留两位小数,但是输出的结果中并非每一次的输出均能够让5进位。这样的时好时坏的函数,非常诡异!! (3)奇进偶舍现象 print(round(4.5)) # 4 print(round(5.5)) # 6 和上面类似,这里也同时出现了四舍五入...
print(round(4.125, 2), type(round(4.125, 2))) print(round(4.126, 2), type(round(4.126, 2))) print(round(2.5), type(round(2.5))) print(round(3.5), type(round(3.5))) print(round(5), type(round(5))) print(round(6), type(round(6))) # 4.12 <class 'float'> # 4.12 <class...
NoteThebehavior of round()forfloats can be surprising:forexample,round(2.675,2)gives2.67instead of the expected2.68.Thisisnota bug:it’s a result of the fact that mostdecimalfractions can’t be represented exactlyasafloat.SeeFloatingPointArithmetic:IssuesandLimitationsformore information. 简单的说就...
round()函数可以接受两个参数,第一个参数是要进行截断的浮点数,第二个参数是要保留的小数位数。为了截断浮点数后面的小数,可以将小数部分与整数部分相加后取整数部分。具体实现如下: 代码语言:txt 复制 import math def truncate_float(num, decimal_places): integer_part = int(num) # 获取整数部分 decimal...
python存float的时候如财务数据等需要四舍五入两位数,但是python自带的四舍五入方法偶尔会存在“五舍六入”,提供两种处理函数 from decimal import Decimal, ROUND_HALF_UP def round_dec(n, d=2): s = '0.' + '0' * d return Decimal(str(n)).quantize(Decimal(s), rounding=ROUND_HALF_UP) ...
as number.NoteThe behavior of round() for floats can be surprising: for example, round(2.675, 2) gives 2.67 instead of the expected 2.68. This is not a bug: it’s a result of the fact that most decimal fractions can’t be represented exactly as a float....
By usingdenormalized numbers, we were able to make the smallest positive float to be 1.0 X 2-...
在Python中,可以使用内置的round()函数来对小数点后的数字进行舍入。round()函数的语法如下: round(number, ndigits) 其中,number是要进行舍入的数字,ndigits是保留的小数位数。如果ndigits未提供,则默认为0,即对整数部分进行舍入。 下面是一些示例:
The behavior ofround()for floats can be surprising: for example,round(2.675,2)gives2.67instead of the expected2.68. This is not a bug: it’s a result of the fact that most decimal fractions can’t be represented exactly as a float. SeeFloating Point Arithmetic: Issues and Limitationsfor ...