One of my guitar strings ripped while I was tuning it!

This would mean replacing the string. Find an instrument store and buy the string that ripped. Thickest is Low E, then A, then D, then G, then B and then the thinnest string is High E.

To replace, place the end of the string that has a hole and put it inside its proper placement in the bridge. Grab the other end of the string and wrap it around the knob with a slight resistance in between. Then tune the string by turning the knob until the string has the right amount of resistance to play the note.