write a recursive function for n

write a recursive function for n

long double fact(int n)

{

 if(n>0)

  return(n*fact(n-1));

 else

  return(1);

}

main()

{

 int n;

 long double fact(int);

 printf("enter any +ve integer (or) 0\n");

 scanf("%d",&n);

 printf("%d!=%Lf\n",n,fact(n));

 getch();

}

Output:


1. Enter the number : 5 Factorial of number: 120 

2. Enter the number : 3 Factorial of number: 6 

3. Enter the number : 9 Factorial of number: -30336 

Conclusion: the program is error free




VIVA QUESTIONS:

1)  What is the meaning of factorial number?
  Ans : Factorial of a number is nothing but the multiplication of numbers from
            a given number to 1

2) What is the meaning of recusive function ?    
    Ans: A function call it self is called recursive function 


3) Define library functions ? 
  Ans: The functions have already been written, compiled and placed in libraries and are called library functions.

4)  Define formal parameters ?
  Ans: Formal parameters are the parameters given in the function declaration as function definition.

Flow chart

Program

Algorithm