"if" versus "whether"
I normally word sentences like this
I want to know whether (or not) it's likely to be heard.
without thinking too much about it.
I assume (but am I right in doing so ?)many English speakers would use "if" instead.
I want to know if it's likely to be heard.
1. Is one more correct than the other ?
2. Is it a matter of formality ?
3. Is it one those BE vs AE affairs ?
4. Is the "or not" I put between brackets optional or compulsory ?
Thanks a lot in advance
"Those are my principles, and if you don't like them....well, I have others." (Groucho Marx).