Program to find factorial of a number in C programming. 




Factorial is represented using '!', so five factorial will be written as (5!), n factorial as (n!). Also, n! = n*(n-1)*(n-2)*(n-3)...3.2.1 and zero factorial is defined as one i.e., 0! = 1.



#include<stdio.h>
#include<conio.h>
void main()
{
int n,i,fact=1;
clrscr();
printf(“Enter any no: ”);
scanf(“%d”,&n);
for(i=n;i>=1;i--)
{
fact=fact*i;
}
printf(“Factorial=%d”,fact);
getch();
}
Output:

Enter a no: 5
Factorial=120