text: // You are given the length and width of a 4-sided polygon. The polygon can either be a rectangle or a square.
  // If it is a square, return its area. If it is a rectangle, return its perimeter.
  
  // area_or_perimeter(6, 10) --> 32
  // area_or_perimeter(3, 3) --> 9
  
  //     Note: for the purposes of this kata you will assume that it is a square if its length and width are equal, otherwise it is a rectangle.
  
  const areaOrPerimeter = function(l , w) {
    return l == w ? l*w : 2*(l+w)
  };