Format variable in f-string with a variable number of decimal places

Question

I need to format the number of decimal places that a variable displays in an f-string using a variable for the number of places.

n = 5
value = 0.345
print(f'{value:.4f}')

Instead of value.4f, I need value.nf where n is the number of decimal places to which the variable should be rounded.

Does this answer your question? [Python3 - Use a variables inside string formatter arguments](https://stackoverflow.com/questions/28330657/python3-use-a-variables-inside-string-formatter-arguments) — Thierry Lathuille, Dec 03 '19 at 13:48

score 22 · Accepted Answer · answered Dec 03 '19 at 13:46

22

This should work:

n = 5
value = 0.345
print(f'{value:.{n}f}')

Output:

0.34500

answered Dec 03 '19 at 13:46

CDJB

1 Answers1