c Program to Find Factorial of a Number without using Recursion

 Program to Find Factorial of a Number without using Recursion

Factorial of a Number :
Factorial of any number which should be non negative is equal to Product of all the integers less than or equal to that particular number. It is denoted by n! where n is any positive number and its factorial will be equal to :
n!=n*(n-1)*(n-2)*(n-3)... and so on till integer value 1 comes.
Let us take the example of 5! . It will be equal to 5*4*3*2*1 => 120 .
0! according to number systems is treated as 1. In this program, we shall use Recursion technique to find the Factorial of any positive number. Copy the Source code and save it as *.c . Compile and run thereafter the C Program.

#include <stdio.h>
main()
{
int n, i;
long fact=1;
printf("\nEnter any number: ");
scanf("%d", &n);
for (i=1; i<=n; i++)
fact = fact*i;
printf("\nFactorial = %ld", fact);
getch();
}

Recursion is a method of solving problems based on the divide and conquer mentality. The basic idea is that you take the original problem and divide it into smaller (more easily solved) instances of itself, solve those smaller instances (usually by using the same algorithm again) and then reassemble them into the final solution.