Checking to see if a variable value exists within an array

Hi

I'm a newbie to Articulate360 and I'm creating my first proper course.

I am wanting to check if a value held in a variable is present in a list of values (potentially an array if possible but open to other suggestions)

There are 18 options I'm wanting to compare the variable value to and to then use a simple if statement that says if it's in the list say "x" and if it's not, say "y"

Can anyone help me get started with this please? I was wondering if I needed JS code?

many thanks in advance

Dawn