FUNCTIONS IN C

Functions:

Functions are the self-contained program that contains several block of

statement which performs the defined task. In C language, we can create one or more

Functions according to the requirements.


Usually, In C programs flows from top left to right bottom of main() functions. We can
create any number of functions below that main() functions. These function are call from main() function.

Requirement while creating a functions.

•  Declare a function
•  Call statement
•  Definition of function.

After the function is called from the main(), the flow of control will return to the main()
function.

WAP to calculate simple interest using function

#include

float interest(void); //function declaration

int main()

{ float si;

si=interest(); //function call

printf("Simple interst is %.2f\n",si);

return 0;

}

float interest() //function definition

{

float p,t,r,i;

printf("Enter Principal, Time and Rate");

scanf("%f%f%f",&p,&t,&r);

i=(p*t*r)/100;

return i; //function return value

}