SyntaxError: return not in function

SyntaxError: 'return' statement outside of function (Edge)
SyntaxError: return not in function (Firefox)
SyntaxError: yield not in function (Firefox)

var cheer = function(score) {
  if (score === 147)
    return 'Maximum!';
  };
  if (score > 100) {
    return 'Century!';
  }
}
// SyntaxError: return not in function

var cheer = function (score) {
  if (score === 147) {
    return "Maximum!";
  }
  if (score > 100) {
    return "Century!";
  }
};