Learn how to round a number to two decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques. Aug 8, 2024 · 7 min read Contents How to Round a nu
Decimal('19.29')>>> a,b,c = data[:3] >>> str(a) '1.34'>>> float(a) 1.34>>> round(a, 1) Decimal('1.3')>>> int(a) 1>>> a * 5 Decimal('6.70')>>> a * b Decimal('2.5058')>>> c % a Decimal('0.77') Decimal 也可以使用一些数学函数: >>> getcontext().prec = ...
3. Round to Multiples Sometimes you need to round to the nearest 5, 10, or any other number rather than decimal places: # Round prices to nearest 5 cents for a pricing strategy prices = np.array([9.97, 24.32, 49.99, 99.73]) rounded_nickels = np.round(prices * 20) / 20 # Multiply...
# Import the decimal module to access Decimal function from decimal import Decimal d3 = Decimal(3.14159) print(d3) Powered By The decimal module offers the following methods to round up numbers: ROUND_UP: Always round away from zero. ROUND_CEILING: Always round towards positive infinity. Wit...
>>>TWOPLACES = Decimal(10) ** -2 # same as Decimal('0.01') >>># Round to two places >>>Decimal('3.214').quantize(TWOPLACES) Decimal('3.21') >>># Validate that a number does not exceed two places >>>Decimal('3.21').quantize(TWOPLACES, context=Context(traps=[Inexact])) ...
要强制Python Decimal至少有两个小数,可以使用Decimal.quantize()方法来实现。 Decimal.quantize()方法用于将Decimal数值按照给定的小数位数进行四舍五入或截断。如果希望强制保留两位小数,可以将小数位数设置为2,并选择四舍五入方式。 以下是一个示例代码: 代码语言:txt 复制 from decimal import Decimal, ROUND_HALF_...
The difference becomes significant if the results are rounded to the nearest cent:>>> >>> from decimal import * >>> round(Decimal('0.70') * Decimal('1.05'), 2) Decimal('0.74') >>> round(.70 * 1.05, 2) 0.73 The Decimal result keeps a trailing zero, automatically inferring four ...
Create integers and floating-point numbers Round numbers to a given number of decimal places Format and display numbers in stringsLet’s get started!Note: This tutorial is adapted from the chapter “Numbers and Math” in Python Basics: A Practical Introduction to Python 3. If you’d prefer a...
import decimal decimal.getcontext().prec = 3 division = decimal.Decimal(72) / decimal.Decimal(7) print(division) again = decimal.Decimal(72) / decimal.Decimal(7) print(again) Let’s see the output for this program: Rounding the numbers It is possible to gracefully round the numbers wi...
def__round__(self,ndigits:Integral=None):"""Rounds self to ndigits decimal places,defaulting to0.If ndigits is omitted or None,returns an Integral,otherwise returns a Real,preferablyofthe same typeasself.Types may choose which direction to round half.For ...