Question about Garmin Forerunner 235

No. It depends somewhat on what you expect from the watch.
Yes, you can wear the watch for swimming, it is sufficiently water resistant. With the GPS mode, you can also measure the distance covered and your speed in open water, for example.
Unfortunately, the watch does not have a real swimming function. It cannot measure laps and arm strokes in the swimming pool.
However, there is a kind of Garmin app store called Connect IQ, where developers can upload their Garmin apps. It's a great way to add more features to your watch. I just discovered a pool swim app there that equips the Garmin 235 with a lap function and can count the laps in a 25 or 50 metre pool. Unfortunately, I can't judge whether the app is good or not.