How to Display Floats with Two Decimal Places in Python?

Displaying Floats with Two Decimal Places in Python

When working with floating-point numbers, it often becomes necessary to display them with a specific number of decimal places. In Python, there are several ways to achieve this using string formatting.

Using the %.2f Format Specifier

The traditional method of formatting floats with two decimal places is to use the % operator and the f format specifier:

number = 5.5
formatted_number = "%.2f" % number
print(formatted_number)  # Output: 5.50

This method works by replacing the % placeholder in the format string with the formatted number. The .2 part indicates that the float should have two decimal places.

Using f-Strings

In Python 3.6 and later, f-strings provide a more concise syntax for formatting strings:

number = 5.5
formatted_number = f"{number:.2f}"
print(formatted_number)  # Output: 5.50

F-strings follow a similar concept as the % operator, but the format specifier is placed within curly braces inside the string.

Using Decimal.quantize()

For more precise control over the formatting, the Decimal module offers a quantize() method:

from decimal import Decimal

number = Decimal("5.5")
formatted_number = number.quantize(Decimal(".01"))
print(formatted_number)  # Output: 5.50

quantize() takes a Decimal object representing the desired rounding precision. In this case, we round to the nearest hundredth (two decimal places).

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