Film Noir is a term relating to black and white gangster/crime films that are mostly filmed in the 1940s-1950s, the ‘Golden Age of Hollywood’. They are associated with a low-key, black and white style that has roots in the German Expressionist style.
Example of Classic Film Noir
Shadow of Doubt (1943) – Alfred Hitchcock
Example of Neo Noir
Frenzy (1972) – Alfred Hitchcock