The C standard library provides numerous built-in functions that your program can call. For example, strcat() to concatenate two strings, memcpy() to copy one memory location to another location, and many more functions. A function can also be referred as a method or a sub-routine or a procedure, etc.
Quick Answer. Authors use repetition for several reasons, including making a point, to set a rhythm, link topics or ideas and to make discussions easier to follow. Using repetition in writing is something that still has rules and should be used with some thought instead of randomly.
Repetition can also be used in art to describe a copied work or a forgery. Artistic students often copy the works of professionals and masters to understand their craft, but forgery is the creation of a piece of work that is passed off to buyers and critics as genuine. Learn more about Fine Art.