Hello 7BNye
Yes, you do. Make sure you compare with full fare tickets if you do not hold the Swiss Half Fare Card.
Furthermore, what you should observe while travelling in our country: Swiss people love their niceties. Politeness is key. When you approach a local to ask for help/assistance, without greeting or saying ‘please’, you are assumed a rude person and people might not be willing to help you to that extent you are expecting it.
Kind regards,
Roland