Rules of a function that returns a value.

1) Function name should follow the rules of variable name.
2) Actual argument(s) and formal argument(s) should be same in number as well as their data type(s).
3) Function may or may not return any value. Function by default returns only integer value.
4) Function can return only one value at a time. To return any value from function, return statement should be used.
5) If a function returns a value other than the integer value then, return data type should be mentioned before the function name in function declaration. Also, prototype definition of such a function should be mentioned before main, if function call precedes function definition.
6) Function which doesn't return any value should be declared as void function.


float square(float);
/* prototype definition */

float s;
s = square(2.5);
/* function call*/


/*function declaration*/

float square(float n)

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History Of C..

In the beginning was Charles Babbage and his Analytical Engine, a machine
he built in 1822 that could be programmed to carry out different computations.
Move forward more than 100 years, where the U.S. government in
1942 used concepts from Babbage’s engine to create the ENIAC, the first
modern computer.
Meanwhile, over at the AT&T Bell Labs, in 1972 Dennis Ritchie was working
with two languages: B (for Bell) and BCPL (Basic Combined Programming
Language). Inspired by Pascal, Mr. Ritchie developed the C programming

My 1st Program...

void main ()
clrscr ();
printf ("\n\n\n\n");
printf ("\t\t\t*******Pankaj *******\n");
printf ("\t\t\t********************************\n");
printf ("\t\t\t\"Life is Good...\"\n");
printf ("\t\t\t********************************");
getch ();

Next Step...


void main ()
clrscr ();
printf ("\n\n\n\n\n\n\n\n");
printf ("\t\t\t --------------------------- \n\n");

printf ("\t\t\t | IGCT, Info Computers, INDIA | \n\n");
printf ("\t\t\t --------------------------- ");

getch ();