One at a time, otherwise the bridge and tailpiece can fall off. Loosen all the strings slightly to reduce pressure, then entirely loosen the string you wish to change. Remove it from the peg and tailpiece, then replace it with a new string. New strings don't like to hold the pitch very well, so try to avoid changing more than one string at a time.
violin strings
A standard violin typically has four strings.
A broken violin.
No, cold weather is bad. It can change the pitch of the strings.
Because it has strings.
The violin is the smallest member of the string family.
the strings of a violin vibrate.
A violin has four strings.
A violin has 4 strings: G, D, A, and E from lowest to highest.
4 strings.
the strings
Actually, there are four strings on a violin. In order from highest to lowest, they are: E, A, D, G.