What is function in oop?

Answer 1

A function is a block of code that has a name and it has a property that it is reusable i.e. it can be executed from as many different points in a C Program as required.

Function groups a number of program statements into a unit and gives it a name. This unit can be invoked from other parts of a program. A computer program cannot handle all the tasks by it self. Instead its requests other program like entities - called functions in C - to get its tasks done. A function is a self contained block of statements that perform a coherent task of same kind

The name of the function is unique in a C Program and is Global. It neams that a function can be accessed from any location with in a C Program. We pass information to the function called arguments specified when the function is called. And the function either returns some value to the point it was called from or returns nothing.

We can divide a long C program into small blocks which can perform a certain task. A function is a self contained block of statements that perform a coherent task of same kind.

Structure of a Function

There are two main parts of the function. The function header and the function body.

int sum(int x, int y)

{

int ans = 0; //holds the answer that will be returned

ans = x + y; //calculate the sum

return ans //return the answer

}

Answer 2

Same as in other languages, but in OOP they are usually called "methods", at least when they are attached to a class.