Join items of a list with '+' sign in a string

Question

I would like my output to be :

Enter a number : n
List from zero to your number is : [0,1,2,3, ... , n]
0 + 1 + 2 + 3 + 4 + 5 ... + n = sum(list)
         


        

Answer 1

You don't need to call str on your list. That returns the str representation of your list and the output of that is joined with '+'.

You can instead use map to convert each item in your list to str, then join:

print('+'.join(map(str, n_nx1lst)) + " = ", sum(n_nx1lst))

You can also use the new style formatting to have a more readable output:

result = '+'.join(map(str, n_nx1lst))
print("{} = {}".format(result, sum(n_nx1lst)))