Guitar Strings

I remember long time ago my father bought a guitar for my brother. Everybody in the family was happy about it because we all knew that everyone should share that guitar. As I have predicted some of the friends of my brother used it so the string goes worn out fast. I found out then that there are two kinds of string a nylon and a nickel. I like the nylon but the nickel has better tune to it. The other day I took the guitar of my hubby out from the case and I found out there is one string lacking so I go to check on rotosound guitar strings at guitar center.