Editing Conditional (computer programming) (section)

====Lisp dialects====
Conditional expressions have always been a fundamental part of [[Lisp (programming language)|Lisp]]{{nbsp}}.  In pure LISP, the <code>COND</code> function is used.  In dialects such as [[Scheme (programming language)|Scheme]], [[Racket (programming language)|Racket]] and [[Common Lisp]]{{nbsp}}:
<syntaxhighlight lang="scheme">
;; Scheme
(define (myvariable x) (if (> x 12) 1 2))   ; Assigns 'myvariable' to 1 or 2, depending on the value of 'x'
</syntaxhighlight>

<syntaxhighlight lang="lisp">
;; Common Lisp
(let ((x 10))
  (setq myvariable (if (> x 12) 2 4)))  ; Assigns 'myvariable' to 2
</syntaxhighlight>

{{See also|McCarthy Formalism}}