Sandhya.Kishan

 Profile Answers by Sandhya.Kishan 

• Apr 30th, 2012

 

Built-in function are the functions which are already present in the standard library files and they can be accessed directly
Example sqrt(),round() etc...

.sqrt()
the above example returns the correctly rounded positive square root of the given value.

The functions which are created by user for program are known as User defined functions.
Example:
void add()
{
int a, b, c;
clrscr();
printf("
Enter Any 2 Numbers : ");
scanf("%d %d",&a,&b);
c = a + b;
printf("
Addition is : %d",c);
}
void main()
{
void add();
add();
getch();
}
Here void add is a used defined function.