1) Write C programs that use both recursive and non-recursive functions To find the factorial of a given integer.

program:

#include<stdio.h>
#include<conio.h>

unsigned int recr_factorial(int n);
unsigned int iter_factorial(int n);

void main()
{
int n,i;
long fact;
clrscr();
printf("Enter the number: ");
scanf("%d",&n);

if(n==0)
printf("Factorial of 0 is 1\n");
else
{
printf("Factorial of %d Using Recursive Function is %d\n",n,recr_factorial(n));
printf("Factorial of %d Using Non-Recursive Function is %d\n",n,iter_factorial(n));
}
getch();
}

/* Recursive Function*/
unsigned int recr_factorial(int n)
s{
return n>=1 ? n * recr_factorial(n-1) : 1;
}

/* Non-Recursive Function*/
unsigned int iter_factorial(int n)
{
int accu = 1;
int i;
for(i = 1; i <= n; i++)
{
accu *= i;
}
return accu;
}