如何在特定于每次迭代的“for循环”中添加字符串？

Question

want to add the minutes that correlate with calories burned at the end of the string

want it to say "You burned x calories on the treadmill in y minutes."

calories burned per minute = 4.2

for numbers in [10,15,20,25,30]: # in minutes
    print('You burned', numbers * 4.2, 'calories on the treadmill. ')

Answer 1

if I understand your question correctly, you want to do something like this:

numbers = [10,15,20,25,30]  # This list could as well be a parameter in some function
for number in numbers:
    print('You burned ' + str(number*4.2) + ' calories in ' + str(number) + ' minutes')

Anyway, there are various ways to format Strings in Python and that is not, in my opinion, the best. So you could replace that line with:

print(f'You burned {number*4.2} calories in {number} minutes')

or

print('You burned {} calories in {} minutes'.format(number*4.2, number))

or

print('You burned %.2f calories in %.2f minutes' % (number*4.2, number))

The f-format is only valid for Python 3.6+. Check this for more information :).

Answer 2

You can loop through the range of 10 to 30 with the step of 5. Then using the new string format insert the necessary calculation and output.

for i in range(10,31,5):
    print(f'You burned {4.2*i} calories on the treadmill in {i} minutes.')