Do I have to change my number if I buy an iphone?

I'm with straight talk Verizon with an old ugly Samsung that I hate. I want to switch to an iphone 5c at the apple store with Verizon. I do not want it with straight talk though. If I buy one, would I have have to change my current phone number?

No, I transferred my number over to the 5c.

No I don't think so