#include <stdio.h>
int factorial(int a);


int main() {
    int a =3;
    
    printf("the value of factorial is %d" , factorial(a));
	//code
	return 0;
}

int factorial(int a){
 
 
 if(a==0 || a==1){
     return 1;
 }else{
     return a * factorial(a-1);
 }
}