What's wrong with it?

Question

https://code.sololearn.com/cOCLvL2r4SVo/?ref=app

Answer 1

Index 'i' should be in square brackets:

new.append(l[i][ : : -1])

Answer 2

1) 'new = []' should be before 'while'
2) you skiped i = i +1, so you got the endless loop
3) there is an error in append. Try this:

new.append(l[i][ : : -1])

Answer 3

Thank you

Answer 4

You are welcome