Repeat a String (freeCodeCamp challenge)

repeat_a_string.txt

/* assignment: Repeat a given string (first argument) num times (second argument). 
Return an empty string if num is not a positive number.
*/

function repeatStringNumTimes(str, num) {
  if (num <= 0) {
    return "";                                // return empty string
  }  
  return str.repeat(num);                     // The repeat() method constructs and returns a new string which contains the specified number (num) of copies 
}                                             // of the string on which it was called, concatenated together.
repeatStringNumTimes("abc", 3);