Question

def missing_char(str,n):
    front = str[:n]
    back = str[n+1:]
    return front + back

I don’t really understand what is being said when back is defined, and furthermore I don’t understand how this actually takes out the letter you specify when you enter a word into the function with the “return front + back” part.

Thanks everyone for the help, you all made me understand it better :).

Answer 1

str[:n] copies the string from the start up to, but not including, the n:th character.
str[n+1:] copies the string from the (n+1):th character to the end.

Adding both these strings will result in all the characters of the original string, except for the n:th character.

str[:n] is a shorthand for str[0:n], and str[n:] is a shorthand for str[n:len(str)].