Following is the source code for calculating the factorial of a number using a For Loop in C Programming.

Following is the source code for calculating the factorial of a number using a DO WHILE Loop in C Programming.

main()
{
  int a,b,i;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&i);
  b=1;
  a=1;
  if(i>=1)
  do
  { b*=a;
    a++;
  }while(a<=i);
   printf("%d\n",b);
}

Following is the source code for calculating the factorial of a number using a Recursive Function in C Programming.

int f(int n)
{
  if (n==0)
    return 1;
  if (n>0)
    return n*f(n-1);
}
main()
{
  int n;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&n);
  printf("%d\n",f(n));
}

Following is the source code for calculating the factorial of a number using a WHILE Loop in C Programming.

main()
{
  int a,b;
  printf("Enter a number between 0 and 33: ");
  scanf("%d",&a);
  b=1;
  while(a>=1)
   { b*=a;
     a--;
   }
  printf("%d\n",b);
}