How to format to n decimal places in Python

user_12103577 0
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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?

string-formatting python
2 Answers

Fields in format strings can be nested:

>>> print(f"{math.pi:.{n}f}")
3.14159
user_146370

For pre-3.6 versions, you can use .format()

print('{:.{}}'.format(math.pi, n)))
user_149731510
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