The documentation for the built-in round() function says that it rounds to the nearest value, rounding ties away from zero. Since the decimal fraction 2.675 is exactly halfway between 2.67 and 2.68, you might expect the result here to be (a binary approximation to) 2.68. It’s not, beca...
round(10):rounds the integer to10 round(10.7):rounds the float10.7to nearest integer,11. round(5.5):rounds the float5.5to6. Example 2: Round a number to the given number of decimal places print(round(2.665,2))print(round(2.675,2)) Run Code Output 2.67 2.67 When the decimal2.675is con...
UseMidpointRoundingwith appropriate overloads ofMath.Round,MathF.Round, andDecimal.Roundto provide more control of the rounding process. There are two overall rounding strategies, round to nearest and directing rounding, and each enumeration field participates in exactly one of these strategies. Round...
在这个示例中,123.5使用ROUND_HALF_UP模式舍入后得到124,而使用ROUND_HALF_DOWN模式舍入后得到123。这展示了两种模式在处理.5这样的中间值时的不同行为。 round Python内置的round函数和decimal模块中的Decimal类的quantize方法都可以用来进行数值的四舍五入,但它们在默认行为上有所不同,并且decimal模块提供了更多的灵...
python标准库的解释及翻译round(number[, ndigits])Return the floating point value number rounded to ndigits digits after the decimal point. If ndigits is omitted, it returns the nearest integer to its input. Delegates to number.__round__(ndigits).For the built-in types...
Python Decimal 模块中的 ROUND_HALF_EVEN 和 ROUND_HALF_DOWN 在Python 中,Decimal 模块提供了高精度的十进制浮点数运算,可以避免浮点数计算时出现的精度丢失问题。Decimal 模块中有两种常用的舍入模式:ROUND_HALF_EVEN 和 ROUND_HALF_DOWN。这两种舍入模式对于处理浮点数的舍入操作非常有用。
第Python实现四舍五入的两个方法总结目录1、使用round2、使用Decimal最后的话 1、使用round 大多数情况下,我们会使用round来保留小数,但这并不符合我们在数学知识里的规则。 round(number[,ndigits]) round()把number(通常是浮点数)按如下规则(Python3)进行四舍五入的: 先说下ndigits不为0的情况: 如果保留...
round(number[,ndigits])Return the floating point valuenumberrounded tondigitsdigits after the decimal point. Ifndigitsis omitted, it returns the nearest integer to its input. Delegates tonumber.__round__(ndigits).For the built-in types supportinground(), values are rounded to the closest mul...
print(round(3.447444, 2)) >>3.45 from decimal import Decimal print(Decimal('0.3') + Decimal('0.9')) >>1.2 import math #向上取
注意，第一条规则是默认的取整规则，即 ‘round to the nearest; ties to even’ 规则，是 binary ...