所以round(0.5)会近似到1,而round(-0.5)会近似到-1。 但是到了python3.5的doc中,文档变成了 "values are rounded to the closest multiple of 10 to the power minus ndigits; if two multiples are equally close, rounding is done toward the even choice." 如果距离两边一样远,会保留到偶数的一边。比如...
6、考虑使用decimal模块:如果你需要更精确的控制或更可靠的舍入行为,可以考虑使用Python的decimal模块,这个模块提供了Decimal类,用于高精度的十进制数运算和舍入。 7、了解Python版本之间的差异:不同版本的Python可能对round()函数的行为有所不同,特别是Python 2和Python 3在舍入到偶数的方式上有所不同,确保你了解...
it returns the nearest integer to its input. Delegates to number.__round__(ndigits).For the built-in types supporting round(), values are rounded to the closest multiple of 10 to the power
"values are rounded to the closest multiple of 10 to the power minus ndigits; if two multiples are equally close, rounding is done toward the even choice." 如果距离两边一样远,会保留到偶数的一边。比如round(0.5)和round(-0.5)都会保留到0,而round(1.5)会保留到2。 Python 2.7 中的结果如下: ...
The NumPy function uses the round half to even strategy, just like Python’s built-in round() function. For example, the following code rounds all of the values in data to three decimal places: Python >>> np.round(data, decimals=3) array([[-0.69 , -2.105, -0.788, 0.934], [ ...
Positive precision values round after the decimal point, while negative values round to the left of the decimal (tens, hundreds, etc.). Note that precision=0 returns a float (3.0) rather than an integer, unlike when no precision is specified (which returns an integer). ...
For the built-in types supportinground(), values are rounded to the closest multiple of 10 to the power minusndigits;if two multiples are equally close,rounding is done toward the even choice(so, for example, bothround(0.5)andround(-0.5)are0, andround(1.5)is2). The return value is an...
# Python round() method to round half to even print(round(2.5)) # 2 print(round(3.5)) # 4 print(round(-2.5)) # -2 Powered By Conclusion Rounding up numbers is an important technique in programming, as it makes it easier to handle numerical values. It is also essential in statistic...
Delegates tonumber.__round__(ndigits).For the built-in types supportinground(), values are rounded to the closest multiple of 10 to the power minusndigits; if two multiples are equally close, rounding is done toward the even choice (so, for example, bothround(0.5)andround(-0.5)are0, ...
Q4. In Python, the round() function rounds up or down? The round() function can round the values up and down both depending on the situation. For <0.5, it rounds down, and for >0.5, it rounds up. For =0.5, the round() function rounds the number off to the nearest even number....