COMPONENTS OF FUNCTIONS

COMPONENTS OF FUNCTIONS :

1. Proto type declaration

2.Function  definition

3.Function call

Prototype declaration

Before the function is defined in the program , the function name and its details should be provided  to the compiler and it can be done  by declaring the function above the main function and such statement is known as Prototype of function or forward declaration of function.

 Syntax

<return_type> Function_name(Argument list);

Example:

Void message();

Int sum(int,int);

Function defination

It is the main part of the function that contains actual logic which perform specific operations of function.the programming statements should be written between flower braces { }.

Syntax

 <return_type>Function_name(Argument list)

{

Function Body

}

Example:

Void message()

{

Statements…………….

}

Int   sum(int  x, int  y)

{

Int  z;

Z=x+y;

return (z);

}

}

Function call

Defining the function does not do anything it should executed .and it can be done by function call .

And a  function can be called simply  by its  name. A function call is specified by the function name enclosed arguments with in parenthesis, terminated by semicolon(;).

Syntax:

 Function_name(arguments_list);

Example:

Message();

Sum(int,int);

Note: A function call should not have any return type