Irony is about expectations and opposites. There are three types of irony.
Verbal irony is when a character or person says one thing but means the complete opposite. This is more commonly known as sarcasm.
Dramatic irony is when a character believes something and the opposite is true. The audience knows that the character is working under false beliefs. This can lead to hilarious or tragic situations.
Situational irony is when the complete opposite of what is expected occurs. When most people think of irony, they are thinking of situational irony.
