Editing Arc (programming language) (section)

== Examples ==
[["Hello, World!" program|Hello world]] in Arc :
<syntaxhighlight lang="lisp">
 (prn "Hello, World")
</syntaxhighlight>

To illustrate Arc's terseness, Graham uses a brief program. It produces a form with one field at the url "/said". When the form is submitted, it leads to a page with a link that says "click here", which then leads to a page with the value of the original input field.<ref>{{cite web |url=http://www.paulgraham.com/arcchallenge.html |title=Take the Arc Challenge |last=Graham |first=Paul |date=February 2008 |website=PaulGraham.com |access-date=2018-12-05}}</ref> 
<syntaxhighlight lang="lisp">
(defop said req
  (aform [onlink "click here" (pr "you said: " (arg _ "foo"))]
    (input "foo") 
    (submit)))
</syntaxhighlight>