In the following code snippet, identify the purpose and functionality of the add() function. Explain in detail, each statement of the add() function and its effect. 

void add(int position, int value) { node* temp = start; node* in = new node; for(int i=0; inext; } in->data = value; in->next = temp->next; temp->next = in; in->prev = temp; 2 if(in->next != NULL){ temp = in->next; temp->prev = in; } }