Why is my if statement with an or operator not working?

Question

https://code.sololearn.com/clPSpRmYguV6/?ref=app

Answer 1

Like this it works:
if (inputMonth.equals("Jan") || inputMonth.equals("Mar"))

What is before and after || has to result in 0 or 1.

Answer 2

you can put as many || in an if sentence as you want, so you can just write other months in the same if statement

Answer 3

do i have to do || inputMonth.equals() 5 more times cause i have 5 more months to put in. is there a way to condense it