85 lines
3.4 KiB
HTML
85 lines
3.4 KiB
HTML
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<!DOCTYPE html>
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<html>
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<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
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copy of the license is included in the section entitled "GNU Free
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Documentation License." -->
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<title>Running Guile Interactively (Guile Reference Manual)</title>
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<meta name="description" content="Running Guile Interactively (Guile Reference Manual)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Hello-Guile_0021.html" rel="up" title="Hello Guile!">
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<link href="Running-Guile-Scripts.html" rel="next" title="Running Guile Scripts">
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</head>
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<body lang="en">
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<div class="section-level-extent" id="Running-Guile-Interactively">
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<div class="nav-panel">
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<p>
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Next: <a href="Running-Guile-Scripts.html" accesskey="n" rel="next">Running Guile Scripts</a>, Up: <a href="Hello-Guile_0021.html" accesskey="u" rel="up">Hello Guile!</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<h3 class="section subsection-level-set-section" id="Running-Guile-Interactively-1"><span>2.1 Running Guile Interactively<a class="copiable-link" href="#Running-Guile-Interactively-1"> ¶</a></span></h3>
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<p>In its simplest form, Guile acts as an interactive interpreter for the
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Scheme programming language, reading and evaluating Scheme expressions
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the user enters from the terminal. Here is a sample interaction between
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Guile and a user; the user’s input appears after the <code class="code">$</code> and
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<code class="code">scheme@(guile-user)></code> prompts:
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</p>
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<div class="example">
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<pre class="example-preformatted">$ guile
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scheme@(guile-user)> (+ 1 2 3) ; add some numbers
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$1 = 6
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scheme@(guile-user)> (define (factorial n) ; define a function
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(if (zero? n) 1 (* n (factorial (- n 1)))))
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scheme@(guile-user)> (factorial 20)
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$2 = 2432902008176640000
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scheme@(guile-user)> (getpwnam "root") ; look in /etc/passwd
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$3 = #("root" "x" 0 0 "root" "/root" "/bin/bash")
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scheme@(guile-user)> <kbd class="kbd">C-d</kbd>
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$
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</pre></div>
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</div>
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</body>
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</html>
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