The guitar is a musical instrument classified as a string instrument with anywhere from four to
18 strings, usually having six. The sound is projected either acoustically,
using a hollow wooden or plastic and wood box (for an acoustic guitar),
or through electrical amplifier and a speaker (for an electric guitar).
It is typically played by strumming or plucking the strings with the fingers,
thumb and/or fingernails of the right hand or with a pick while fretting
(or pressing against the frets) the strings with the fingers of the left hand.