Coderbyte Factorial function

2-FirstFactorial.js

function FirstFactorial(num) { 
  var factorial = 1;
  // code goes here  
  for(i = 2; i <= num; i++) {
      factorial *= i; 
  }
  return factorial; 
         
}
   
// keep this function call here 
// to see how to enter arguments in JavaScript scroll down
FirstFactorial(readline());