ROUND_HALF_DOWN 是另一种常见的舍入模式,当小数部分为5时,总是向下舍入。这意味着无论前一位是奇数还是偶数,都会向下舍入。 fromdecimalimportDecimal,ROUND_HALF_DOWN num1=Decimal('1.5').quantize(Decimal('1'),rounding=ROUND_HALF_DOWN)num2=Decimal('2.5').quantize(Decimal('1'),rounding=ROUND_HALF...
Rounding half to even (bankers’ rounding) is when a number is exactly halfway between two integers, it is rounded to the nearest even integer. This technique is useful since it can help minimize cumulative rounding errors. Round to 2 decimal places using string formatting techniques String ...
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...
If no specifications are provided, it rounds to zero decimal places, giving us the nearest integer. 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...
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 ...
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
0.3 False补充：round 函数对应IEEE 754定义的第一种 Rounding 方法 "Round to nearest, ties to ...
The number 1.64 rounded to one decimal place is 1.6. Now open up an interpreter session and round 2.5 to the nearest whole number using Python’s built-in round() function: Python >>> round(2.5) 2 Gasp! Check out how round() handles the number 1.5: Python >>> round(1.5) 2 ...
Rounding to 2 decimals by decimal module Method 4: Exploring the ceil( ) Function The ceil( ) function is the final technique that will be covered in this article detailing the different ways to round to 2 decimals. This function rounds the decimals up to the nearest integer of the ...
Now, let’s round this value to two decimal places. We use the round() method. The round() method. lets you round a value to the nearest integer or the nearest decimal place. We also print the amount each friend has to contribute toward dinner to the console: rounded_value = round(...