Question

compute and print factorial if it is equal to 6,

not equal to 6,

and square of the factorial, if the input is equal to 6 ..... C programming

Answer 1

#include <stdio.h>

int factorial(int a); //function prototype to calculate factorial

int main(int argc, char *argv[]) {

int a,b;
printf("Enter input:\n");
scanf("%d",&a); //stores the input
b=factorial(a); //calculate factorial of input
  
printf("Factorial of %d is %d\n",a,b); //display factorial
if(a==6){
   printf("Square of factorial of %d is %d\n",a,b*b); //if input is 6 then display square of factorial also
}
  
return 0;


}

//function to calculate factorial
int factorial(int a){
   if(a==0){
       return 1;
   }else{
       return a*factorial(a-1);
   }
}