#include<stdio.h>
    #include<conio.h>
    void main()
    {
        longint fact=1,i,n;
        clrscr();
        printf("\n ENTER THE VALUE OF N: ");
        scanf("%ld",&n);
        for(i=n;i>=1;i--)
        fact = fact * i;
        printf("\nTHE FACTORIAL VALUE IS %ld",fact);
        getch();

    }

******************** OUTPUT *************************************************

     ENTER THE VALUE OF N: 9

     THE FACTORIAL VALUE IS 362880

*****************************************************************************