The violin, sometimes known as a fiddle, is a wooden chordophone (string
instrument) in the violin family. Most violins have a hollow wooden
body. It is the smallest and thus highest-pitched instrument (soprano)
in the family in regular use.[a] The violin typically has four strings
(some can have five), usually tuned in perfect fifths with notes G3, D4,
A4, E5, and is most commonly played by drawing a bow across its strings.
It can also be played by plucking the strings with the fingers
(pizzicato) and, in specialized cases, by striking the strings with the
wooden side of the bow (col legno).
📖 Read on Wikipedia