JavaScript function chaining

function test(val) {
  var n = val || 0;
  document.write(n, '<br>');
  
  function add(addN) {
    addN = addN || 0;
    document.write('[add ', addN, ']<br>');
    
    n += addN;

    document.write(n, '<br>');
    
    return this;
  }
  
  function times(timesN) {
    timesN = timesN || 1;
    document.write('[times ', timesN, ']<br>');
    
    n *= timesN;
    document.write(n, '<br>');

    return this;
  }
  
  function get() {
    document.write('[get]<br>', n);
    return this;
  }

  return {
    add: add,
    times: times,
    get: get
  };
}


test(2).add(3).times(2).get();