C language program to find out the factorial of an integer by using "while" loop.

#include<stdio.h>

main()

{

          double n,ans=1;

          clrscr();

          printf(" Enter a number\n to find factorial of it : ");

          scanf("%lf",&n);

          while (n>1.)

          {

          ans*=n;

          --n;

          }

          printf(" answer = %.2lf",ans);

          getch();

}