What is the author's style in The King and I by Rodgers and Hammerstein?

Together Richard Rodgers and Oscar Hammerstein produced eleven musicals. The King and I was one of their most popular. A musical is a drama with singing, music, and spoken dialogue. The songs express the sentiments of one or more characters and may be addressed directly to other characters in the play. For example, Anna sings "Whistle a Happy Tune" in direct address to her son Louis, and Lady Thiang sings "Something Wonderful" to Anna. Sometimes the song is simply an expression of a character's state of mind, as when the King sings "A Puzzlement."