Which illness does Dustin Hofmann's character suffer from in the film "Rain Man"?

Explanation

Rain Man is an Oscar-winning American drama film from 1988 which tells the story of an abrasive and selfish yuppie, Charlie Babbit (Tom Cruise). Charlie discovers that his father has left his estate to his brother, Raymond (Dustin Hoffman), who is an autistic savant of whose existence Charlie was unaware. Now the two men get to know each other as brothers. The character Raymond was inspired by a real person, Kim Peel.