The violin is a string instrument known for its beautiful, expressive sound. It has four strings that are usually made of gut, steel, or synthetic materials. Players use a bow, which is made of horsehair, to create music by drawing it across the strings. The violin is a key instrument in many genres, including classical, folk, and jazz. To play the violin, musicians must learn to position their fingers on the fingerboard and control the bow's movement. Famous composers like Johann Sebastian Bach and Wolfgang Amadeus Mozart wrote beautiful pieces for the violin, showcasing its versatility and emotional depth.