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Interactive help: Difference between revisions
→{{header|Common Lisp}}
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gawk '{ sum += $1 }; END { print sum }' file
gawk -F: '{ print $1 }' /etc/passwd
</pre>
=={{header|Common Lisp}}==
Common Lisp supports several interactive features for exploring the language and runtime. The built-in functions [http://www.lispworks.com/documentation/lw71/CLHS/Body/f_docume.htm <code>documentation</code>] and [http://clhs.lisp.se/Body/f_descri.htm#describe <code>describe</code>] will both present information on objects in the system.
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<pre>
CL-USER> (describe #'char-code)
#<FUNCTION CHAR-CODE>
[compiled function]
Lambda-list: (CHAR)
Declared type: (FUNCTION (CHARACTER) (VALUES (MOD 1114112) &OPTIONAL))
Documentation:
Return the integer code of CHAR.
Known attributes: foldable, flushable, unsafely-flushable, movable
Source file: SYS:SRC;CODE;TARGET-CHAR.LISP
; No value
CL-USER> (documentation #'char-code 'function)
"Return the integer code of CHAR."
</pre>
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Additionally, by pressing <code>F1</code> in the listener, you can access the help browser, an offline version of [https://docs.factorcode.org/content/article-handbook.html Factor's documentation]. Factor's help browser interfaces with the listener in various ways. For example, pressing <code>ctrl+h</code> while the cursor is over a word will take you to that word's documentation. Running <code>"sequences" about</code> in the listener will take you to the documentation for the <code>sequences</code> vocabulary.
=={{header|FreeBASIC}}==
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