C Program to demonstrate functions.

C Program to demonstrate functions. C Functions are block of codes, performs the specific task. Default function in C is main(). Advantages of the functions are easy to understand, coding, well defined tasks, easy error handling. There are several ways to call the functions like, pass by value, pass by reference etc.. Read more about C Programming Language .

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#include<stdio.h>
int add( int, int); /* Function declaration */

main()
{
int i=1;
printf("i starts out life as %d.", i);

i = add(1, 1); /* Function call */

printf(" And becomes %d after function is executed.n", i);
}

/************************************************************************/

int add( int a, int b) /* Function definition */
{
int c;
c = a + b;
return c;
}
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