Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
Round the number n to p decimal places by first shifting the decimal point in n by p places. To do that, multiply n by 10ᵖ (10 raised to the p power) to get a new number, m. Then look at the digit d in the first decimal place of m. If d is less than 5, round m ...
print(round(4.115, 2), type(round(4.115, 2))) print(round(4.116, 2), type(round(4.116, 2))) 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...
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 )
你会发现,通过在操作系统的命令行 shell 中键入python3 -m doctest example_script.py或pytest,可以验证本书中大多数代码的正确性。示例代码仓库根目录下的pytest.ini配置确保 doctests 被pytest命令收集和执行。 皂盒:我的个人观点 从1998 年开始,我一直在使用、教授和探讨 Python,我喜欢研究和比较编程语言、它们...
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: import decimal ...
Q2. How do you round a float in Python 3? You round off a float number to your desired decimal place using the built-in function round() in Python. Q3. How do you round a number num to three decimal places in Python? The syntax for that would look like this: round(num, 3) Q4...
请帮帮忙摘要：先根据精度值，对number类型的数据从左边第一个非零数字开始数精度值个位数，之后的位数...
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') >>>getcontext().prec = 6 # 设置精度,即最大小数位数 ...
round([decimals, out]) :返回指定精度后的矩阵,指定的位数采用四舍五入,若为1,则保留一位小数 searchsorted(v[, side, sorter]) :搜索V在矩阵中的索引位置 sort([axis, kind, order]) :对矩阵进行排序或者按轴的方向进行排序 squeeze([axis]) :移除长度为1的轴 ...