#include

int main() { int n, i; unsigned long long factorial = 1;

printf("Enter an integer: "); scanf("%d",&n); //Taking input and storing in 'n'

// If user enters a negative integer if (n < 0) printf("Error! Invalid Input. ");

else { for(i=1; i<=n; i++) { factorial *= i; // factorial = factorial*i; } printf("Factorial of %d = %llu ", n, factorial); }

return 0; }//end function main

THIS IS MY CODE, I AM HAVING TROUBLE MAKING IT RECOGNIZE NON-INTEGER INPUTS AS INVALID, HOW CAN I DO THIS?