Format a number with a certain number of decimals

Question

How do I make the user choose the number of decimals of a number?

EX:

from math import pi

x = int(input('número de casas decimais de pi: '))

I want to be able to print on the screen pi formatted with x decimal places.

Answer 1

You can use the constant math.pi together with the function round, which takes as a parameter a number and the number of boxes after the comma.

Ex.:

from math import pi

casas = int(input('Número de casas decimais de pi: '))
print(round(pi, casas))

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