Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
1、Python四舍五入,round函数用于精度没有要求的地方 整数及保留一位小数的时候使用round函数,可以正常四舍五入 2、decimal模块处理四舍五入,用于精度有要求的地方 Decimal.Context(prec=3,rounding=ROUND_HALF_UP).create_decimal(string类型)返回正常的四舍五入的答案 本节知识视频教程 本节课程我们学习数字格式化...
print(round(3.447444,2))>>3.45 fromdecimalimport Decimal print(Decimal('0.3') + Decimal('0.9'))>>1.2 importmath#向上取整math.ceil( x )importmath#向下取整math.floor( x )
On the other hand, you round 1.51 toward zero in the second decimal place, resulting in the number 1.5. This ends in a 5, so you then round the first decimal place away from zero to 1.6.In this section, you’ve only focused on the rounding aspects of the decimal module. There are ...
import decimal #Can be rounded to 13.48 or 13.49 rounded = round(13.485, 2) print(rounded) Let’s see the output for this program: The number in program can be rounded to 13.48 or 13.49. By default, theround(...)function rounds down. This can be changed as well: ...
>>>from decimal import * >>>getcontext() Context(prec=28, rounding=ROUND_HALF_EVEN, Emin=-999999, Emax=999999, capitals=1, clamp=0, flags=[], traps=[InvalidOperation, DivisionByZero, Overflow]) >>>Decimal('5')/3 Decimal('1.666666666666666666666666667') ...
round(a,2) ‘%.2f’ % a Decimal(‘5.000’).quantize(Decimal(‘0.00’)) 当需要输出的结果要求有两位小数的时候,字符串形式的:’%.2f’ % a 方式最好,其次用Decimal。 需要注意的: 可以传递给Decimal整型或者字符串参数,但不能是浮点数据,因为浮点数据本身就不准确。
Expression: round(!area!, 2) 通过math 模块将米转换成英尺。 以转换值为底,以 2 为指数进行幂运算,然后再乘以 area。 Expression: MetersToFeet((float(!shape.area!))) Code Block: import math def MetersToFeet(area): return math.pow(3.2808, 2) * area ...
The number of decimal places is set to zero by default. So the round() function returns the nearest integer to the number passed if the number is the only argument passed. The round() Function in Python: Syntax round(number, numberOfDigitsPostDecimal) Here: number refers to the number ...
Round to nearest, ties to even – rounds to the nearest value; if the number falls midway it ...