Erik reading the way you help other people makes me feel that you understand quickly . I cant beleave that you rearly require comments for that simple codes to understand
come on .
The issue is NOT whether it is 'required', the issue is "it is more work for the helper due to the OPs total disregard for making it easy to help him.
Were I paid for my sevices, the first thing i would do would be to add comments, even before trying in the least way to find the problem. Not being paid, I leave that part to the OP, who should be considerate enough to make it easy for those that are willing to help him for free.

now dont mark this thread as provocative or troll ;)
I will not, It is not 'provocative' just another opinion.

Erik