SHOULD THERE BE A QUESTION MARK OR NOT? IT’S AN INDIRECT QUESTION BUT AN ANSWER WOULD BE EXPECTED.
There’s a party later if you’re interested.
There’s a party later if you’re interested?
Answer
No, because it is a declarative statement.
There should be a comma though.
There’s a party later, if you’re interested.
Attribution
Source : Link , Question Author : Jack , Answer Author : Carly