pythonOff-by-oneMedium

Substring returns too many characters

Time: 0:00

What it should do

last_n_chars(text, n) should return the last n characters of a string, so last_n_chars("debugging", 3) gives "ing".

What goes wrong

last_n_chars("debugging", 3) returns "ging" — four characters instead of three.

Hints

This is an off-by-one errors bug

The loop that runs one time too many, the slice that drops the last item, the index that starts in the wrong place.