In object-oriented approach, functions used to carry out subtasks are also called "helper" functions, because they are usually used by other functions in the object to complete "sub-tasks". Functions are also known as â€methods’. When the task to be carried out by an object is complicated, it is preferable to break it into subtasks or subroutines. It is accomplished by helper functions. They may or may not accept data and may or may not return a value.
