Function definition in C programming

A function definition is a group of statements that is executed when it is called from some point of the program. The general syntax is

return_type function_name (parameter1, parameter2, ....., parametern)

{ - - - - -

statements ;

- - - - -

}

Where,

􀂃 return_type is the data type specifier of data returned by the function.

􀂃 function_name is the identifier by which it will be possible to call the function.

􀂃 Parameters (as many as needed) : Each parameter consists of a data type specifier followed by an identifier like any regular variable declaration. (for eg: int x) and which acts within the function as a regular local variable. They allow to pass arguments to the function when it is called. The different parameters are separated by commas.

􀂃 Statements is the function’s body. It is a block of statements surrounded by braces{}.

􀂃The first line of the function definition is k/a function header.

#include<stdio.h>

int addition (int a, int b) /* function prototype */

main()

{ int 2 ;

2 = addition (5,3) ; /*function call */

printf (“The result is%d”z) ;

}

int addition(int a, int b) /* function header */

{ int r;

r = a+b

return r;

}

Output:

The result is 8