Repeat a given string (first argument) n times (second argument). Return an empty string if n is a negative number.

gist6

// Bonfire: Repeat a string repeat a string
// Author: @piqueen314
// Challenge: http://www.freecodecamp.com/challenges/bonfire-repeat-a-string-repeat-a-string
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function repeat(str, num) {
  // repeat after me
  var newStr="";
  for(var i=0; i<num; i++){
    newStr=newStr.concat(str);
  }
  alert(newStr);
  return newStr;
}