How to calculate factorial of a number using recursion

Write a program to calculate factorial of a number . Number being entered by user.

In this post we shall learn how to calculate factorial of a number through a program written in c
In this program user will enter a number (integer value) and program will display the corresponding factorial of the entered number.
As we know the factorial of n is  = n(n-1)(n-2)(n-3).........3.2.1.

now see the program

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

int factorial(int);
int main()
{
 int number,result;
 printf("Enter a number\t");
 scanf("%d",&number);
 result = factorial(number);
 printf("\n The factorial of %d is = %d",number,result);
}
int factorial(int n)
{
    if(n == 0 || n == 1)
    {
        return(1);
    }
    else
    {
        return(n*factorial(n-1));
    }
}

Output:

Enter a number  5
The factorial of 5 is = 120


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