CODEWITHSUNDEEP
pythonpython-3.x
David542
David542

Reputation: 110482

How to format a decimal in python with variable number of decimals

To format the number 20 as 20.00 I can do:

'%.2f' % 20.283928
'20.28'

However, I want to allow the user to be able to specify the number of decimal places. For example:

value = 20.283928
num_decimal_places = 7 # from user input
'%.%sf' % (20, '7')

How could I do something like the above?

Upvotes: 3

Views: 106

Answers (2)

Mark
Mark

Reputation: 92461

If you are willing to use newer format you can do this:

>>> n = 4
>>> value = 20.283928
>>> '{:.{count}f}'.format(value, count=n)

'20.2839'

Upvotes: 1

U13-Forward
U13-Forward

Reputation: 71610

If version of python greater or equals to 3.6:

print(f'%.{num_decimal_places}f'%value)

Output:

20.2839280

Upvotes: 3

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