whether · conjunction /ˈweð.ər/
whether
B1 used especially in reporting questions and when expressing doubt to mean if
Dictionary examples:
I wasn't sure whether you'd like it.
She asked me whether I was interested in working for her.
I doubt whether it'll work.
It all depends on whether or not she's got the time.
Learner example:
It's very expensive and I'm so broke that I don't know whether I can afford to buy one. (Preliminary English Test; B1; French)
whether... or
B1 used to talk about a choice between two or more possibilities
Dictionary examples:
I'm going, whether she likes it or not.
Someone's got to tell her, whether it's you or me.
Let's face it - you're going to be late whether you go by bus or train.
Learner example:
I don't know whether to stay or to go. (Preliminary English Test; B1; Spanish)