The guitar usually has six strings, but four, seven, eight, ten, and twelve string guitars also exist. Guitars are made and repaired by luthiers.
Guitars are recognized as one of the primary instruments in blues, country, flamenco, rock music, and many forms of pop. It is also a solo classical instrument.
Guitars may be played acoustically or they may rely on an amplifier that can electronically manipulate tone. The electric guitar was introduced in the 20th century and continues to have a profound influence on popular culture.