Citizens of some countries such as Ecuador or Bolivia need to apply for the Schengen visa if they want to travel to Switzerland for less than 90 days. To be granted, different requirements must be met, such as having a round trip flight ticket. You have all the information in: «Requirements and documents to travel to Switzerland: do you need a visa?«.
You have all the information in: "Requirements and documents to travel to Switzerland: do you need a visa?".