Play audio slide show -- Keyboard shortcut: 'x'  Lecture overview -- Keyboard shortcut: 'u'  Previous page: Optional parameters of Scheme functions (2) -- Keyboard shortcut: 'p'  Next page: Function definition in Scheme -- Keyboard shortcut: 'n'  Lecture notes - all slides together  Annotated slide -- Keyboard shortcut: 't'  Textbook -- Keyboard shortcut: 'v'  Alphabetic index  Help page about these notes  Course home      Expressions, Types, and Functions - slide 42 : 46

Closures
Functions capture the free names in the context of the lambda expression
To see this image you must download and install the SVG plugin from Adobe.In Firefox please consultthis page.