Question

what is whether ? Can you help me please ...

Answer 1

1. used to introduce the first of two or more alternatives, and sometimes repeated before the second or later alternative, usually with the correlative
"It matters little whether we go or stay. Whether we go or whether we stay, the result is the same."
or
2. used to introduce a single alternative, the other being implied or understood, or some clause or element not involving alternatives
" See whether or not she has come. I doubt whether we can do any better."