A code consists of a limited set of signs. According to the shape of the signs, the messages are classified as visual and auditory.
Human language constitutes a complex communication system capable of transmitting a large amount of information. The signs that this language is served are called linguistic signs.
The components of the linguistic sign are two significant and the meaning. The relationship between the meaning and the signifier is arbitrary.
According to the intention of the verbal communication, the following functions of the language can be established: expressive, conative, factual or contact, referential or representative, poetic or aesthetic and metalinguistic.