dollarizing

gistfile1.txt

N.howMuch.dollarize = function(num){
  var l = num.toString().length;
  var dollarized;
  if ( l >= 1 && l <= 3 ){
    dollarized = num;
  }
  else if ( l >= 4 && l <= 6 ){
    dollarized = num.toString().substring(0, l-3) + 'K';
  }
  else if (l > 6 ){
    dollarized = num.toString().substring(0, l-6) + 'M';
  }
  return '$' + dollarized;
}