Question

what do you mean by function ? how are they useful ?​

Answer 1

Answer:

Func tions are "self cont ained" modu les of cod e that ac complish a spec ific task. Functions us ually "take in" d ata, process it, and "retu rn" a res ult. On ce a functi on is written, it can be us ed over and over an d over again. Functi ons ca n be "c alled" fr om the ins ide of other func tions.