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Programming Paradigms
Introduction to Functional Programming in Scheme
Practical list construction

cons is the basic list constructor function - but it can be applied through a number of other means as well

  • List and S-expression construction:

    • Deep cons expressions

    • Using the list function

    • Using quote  or  quasiquote also known as backquote

Expression

Value

(cons 1 (cons 2 (cons (+ 1 2) '())))
(1 2 3)
(list 1 2 (+ 1 2))
(1 2 3)
(quote (1 2 (+ 1 2)))
(1 2 (+ 1 2))
'(1 2 (+ 1 2))
(1 2 (+ 1 2))
(quasiquote (1 2 (unquote (+ 1 2))))
(1 2 3)
`(1 2 ,(+ 1 2))
(1 2 3)

Examples of list construction by use of cons , list and quoted list expressions.

Go to exerciseEvery second element of a list