What is the role and responsiblity of the king in Spain in the Spanish government?

Question

What is the role of the king, socially or politically, in Spain? Recently Spain's monarch abdicated his throne for his son. [See info](http://www.washingtonpost.com/news/morning-mix/wp/2014/06/02/deeply-unpopular-spanish-king-to-abdicate-throne-in-favor-of-son/)

Answer 1

I would say he is now a diplomat. He has frequent conversations with other leaders. I think he is also the person who can guarantee the use of the Constitution, as there are some parties that don't want to follow it.