C Program to find the factorial of given number.

Factorial Of Given Number :

#include<stdio.h> 
int main(void) 
{ 
    int n,num; 
    long fact=1; 
    printf("Enter any number : "); 
    scanf("%d",&n); 
    num=n; 
    if(n<0) 
        printf("Invalid Number(-ve)\n"); 
    else 
    { 
        while(n>1) 
        { 
            fact*=n; 
            n--; 
        } 
        printf("Factorial of %d is : %ld\n",num,fact); 
    } 
    return 0; 
}

Output:

Enter any number : 10
Factorial of 10 is : 3628800

Enter any number : -5
Invalid Number(-ve)

Factorial Of Given Number Recursive:

#include<stdio.h> 
long int factorial(int n); 
int main(void) 
{ 
    int num; 
    printf("Enter any number : "); 
    scanf("%d", &num); 
    if(num<0) 
        printf("Invalid Number(-ve)\n"); 
    else 
        printf("Factorial of %d is : %ld\n", num, factorial(num) ); 
 
    return 0; 
} 
 
long int factorial(int n) 
{ 
    if(n==0) 
        return 1; 
    return(n*factorial(n-1)); 
}

Output:

Enter any number : 5
Factorial of 5 is : 120

Enter any number : -5
Invalid Number(-ve)

Happy Learning 🙂