Can anyone please explain me why string concatenation using + operator has complexity of O(xn^2) where x is no of characters added per iteration to string? You can refer to the article here!!!\n[https://medium.com/python-in-plain-english/concatenating-strings-efficiently-in-python-9bfc8e8d6f6e](http://)\nPlease explain this:\nNumber of copies made= 1(number of characters)+2(number of characters)+3(number of characters)+......n(in the above article)\nWhy are we multiplying with number of characters?? Whats the need?? \nAny inputs will be appreciated!!

Can anyone please explain me why string concatenation using + operator has complexity of O(xn^2) where x is no of characters added per iteration to string? You 