string formatting - How to format to n decimal places in Python

Question

I have a variable n and I want to print n decimal places.

import math
n = 5
print(f"{math.pi:.nf}")

ValueError: Format specifier missing precision

This doesn't work, but how might it be done?

question from:https://stackoverflow.com/questions/65940742/how-to-format-to-n-decimal-places-in-python

Answer 1

Fields in format strings can be nested:

>>> print(f"{math.pi:.{n}f}")
3.14159