4、就是要四舍五入怎么办? 如果说非要进行四舍五入,就要用到decimal模块,进行下面处理以后就可以得到 写在最后: python中对于小数的处理可以说是非常的谨慎了,所以我们在进行小数点保留问题时,除非特殊需求,否则直接使用round函数就可以了,使用该函数进行计算时,结果会更加的科学精确。
Note:The 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. 若需了解更多信息可以访问:Floating Point...
3.14159 rounded to two decimal places is 3.14. 1. 2.3 使用注意事项 当ndigits为负数时,round()会将数字四舍五入到最接近的10的幂,例如: num=1234rounded_num=round(num,-1)print(f"{num}rounded to the nearest ten is{rounded_num}.") 1. 2. 3. 输出结果: 1234 rounded to the nearest ten i...
Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
/*[clinic input]round as builtin_roundnumber: objectndigits: object = NoneRound a number to a given precision in decimal digits.The return value is an integer if ndigits is omitted or None. Otherwisethe return value has the same type as the number. ndigits may be negative.[clinic start...
#round() doesn't seem to be rounding properly 最上面编号107 的回应里使用655.665 取小数两位, 四舍五入应该是655.67 才对, 但Numpy 却传回655.66, 舍去没有进位: >>>np.round(655.665, 2) 655.66 看来Numpy 似乎也不太牢靠. 不过编号36 的回应却给出期望的655.67, 它使用decimal.Decimal类别搭配ROUND_...
一定有的!使用Python的内置模块decimal 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from decimalimportDecimal,ROUND_HALF_UPDecimal(4.5).quantize(Decimal('0'),rounding=ROUND_HALF_UP) 结果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ...
python自带整除,python2中是/,3中是//,还有div函数。 字符串格式化可以做截断使用,例如 "%.2f" % value(保留两位小数并变成字符串……如果还想用浮点数请披上float()的外衣)。 当然,对浮点数精度要求如果很高的话,请用嘚瑟馍,不对不对,请用decimal模块。
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
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. ...