Python Forum

Hi there,

This is my first participation. to answer ►How many miles are there in 10 kilometers?
Is this way correct:
▼

miles_in_kilometer = 10 / 1.61
print('There are {} miles in 10 kilometers'.format (miles_in_kilometer))

It depends on what you mean by correct?
if you want the output to be

Output:
There are 6.211180124223602 miles in 10 kilometers

Then it is correct?
Note: your conversion amount 1.61 is quite rounded up, it would probably be better using 1.609344

Thanks for your prompt reply,
I mean is it correct when I answer this question..

How many miles are there in 10 kilometers?

Is it approximately 6.1 miles in 10 kilometers? and this Python code is correct output..!

Thanks,
I am trying to understand all exercises in Think Python book ...

Thanks again..

You probably want to control display of the result. I would go with yard precision:

>>> miles_in_kilometer = 10 / 1.61
>>> print('There are {:.3f} miles in 10 kilometers'.format(miles_in_kilometer))
There are 6.211 miles in 10 kilometers

Of course one can use expressions inside f-strings so it can be written also as:

>>> f'There are {10/1.61:.3f} miles in 10 kilometers'
'There are 6.211 miles in 10 kilometers'

PS - don't use space between format and opening parenthesis.

Without an example of what a correct output should look like, no one knows what correct is.
@perfringo is assuming you want 3 decimal places but that might not be correct.

Thanks @perfringo,
It's a good way to display decimal with f-string.

Thank to you all