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6 mar 2010 · 6 Answers. Sorted by: 140. If you have Python 2.6 or newer, use format: '{0:.3g}'.format(num) For Python 2.5 or older: '%.3g'%(num) Explanation: {0} tells format to print the first argument -- in this case, num.
The Decimal("1.0") argument in .quantize() determines the number of decimal places to round the number. Since 1.0 has one decimal place, the number 1.65 rounds to a single decimal place. The default rounding strategy is rounding half to even, so the result is 1.6.
Formatting can be used when you want to round off a number to a specific number of decimal places, or when you want your number to be separated by commas. To format numbers we can use f-string or format() function.
Round numbers to a given number of decimal places. Format and display numbers in strings. Let’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 video course, then check out Python Basics: Numbers and Math.
15 sty 2024 · Round decimals to a specific number of digits. The quantize() method of Decimal enables precise rounding with various modes. decimal.Decimal.quantize() — Python 3.12.1 documentation; Specify a Decimal with the desired precision as the first argument. You can specify Decimal() with a string like '0.1' or '0.01'.
25 lut 2024 · Method 1: String Formatting. Strengths: Readable and flexible. Weaknesses: Produces a string instead of a float which may require conversion for further numerical operations. Method 2: Round Function. Strengths: Simple and built-in to Python.
8 sty 2022 · We covered common data types to specify the number of decimal places in Python. We walked through the fast and straightforward ways to set decimal places of floats using the modulo operator, the format method, and the round method.
