Python float precision to 3

To format a floating-point number in Python with a precision of 3 decimal places, you can use the format() function or f-strings.

You can also use the round() function. Here’s an example of the syntax:

number = 3.14159265359
rounded_number = round(number, 3)
print(rounded_number)  # Output: 3.142

Python float precision to 3 example

Here are a few examples of setting the precision of a floating-point number to 3 decimal places in Python:

Using the format() function

number = 3.14159265359
formatted_number = format(number, ".3f")
print(formatted_number)  # Output: 3.142

Using f-strings

number = 3.14159265359
formatted_number = f"{number:.3f}"
print(formatted_number)  # Output: 3.142

Using the round() function

number = 3.14159265359
rounded_number = round(number, 3)
print(rounded_number)  # Output: 3.142

Output:

In Python, the float type does not inherently have a fixed precision. The precision of a float is determined by the floating-point representation used by the underlying hardware, which is typically based on the IEEE 754 standard.

Do comment if you have any doubts or suggestions on this Python float topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.