"Prove that if a series of continuous functions converges uniformly, then the sum function is also continuous."

I'm trying to interpret what this is saying so that I can know what to prove. Does the given portion mean that the individual f_n's uniformly converge to f, or that $\displaystyle \sum_{n=1}^{\infty} f_n \to \sum_{n=1}^{\infty} f$?

And what does "the sum function is continuous" mean? Simply that $\displaystyle \sum_{n=1}^{\infty} f$ is continuous?