Comparison "or" conditional I'm trying to use a conditional to do something if the first segment matches This or That. But I'm unable to come up with the right operator for the "or"

{% elseif craft.request.firstSegment == 'This' || 'That' %}


What's the proper operator here? Thanks!
You want:

{% if craft.request.firstSegment == 'This' or craft.request.firstSegment == 'That' %}


or this would work:

{% if craft.request.firstSegment in ['This', 'That'] %}