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<a name="Introduction-to-Strings"></a>
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<p>
Next: <a href="maxima_16.html#Functions-and-Variables-for-Strings" accesskey="n" rel="next">Functions and Variables for Strings</a>, Previous: <a href="maxima_14.html#Strings" accesskey="p" rel="previous">Strings</a>, Up: <a href="maxima_14.html#Strings" accesskey="u" rel="up">Strings</a> [<a href="maxima_toc.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="maxima_423.html#Function-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
</div>
<a name="Introduction-to-Strings-1"></a>
<h4 class="subsection">5.2.1 Introduction to Strings</h4>
<a name="index-backslash"></a>
<p>Strings (quoted character sequences) are enclosed in double quote marks <code>"</code>
for input, and displayed with or without the quote marks, depending on the
global variable <code><a href="maxima_16.html#stringdisp">stringdisp</a></code>.
</p>
<p>Strings may contain any characters, including embedded tab, newline, and
carriage return characters. The sequence <code>\"</code> is recognized as a literal
double quote, and <code>\\</code> as a literal backslash. When backslash appears at
the end of a line, the backslash and the line termination (either newline or
carriage return and newline) are ignored, so that the string continues with the
next line. No other special combinations of backslash with another character
are recognized; when backslash appears before any character other than <code>"</code>,
<code>\</code>, or a line termination, the backslash is ignored. There is no way to
represent a special character (such as tab, newline, or carriage return)
except by embedding the literal character in the string.
</p>
<p>There is no character type in Maxima; a single character is represented as a
one-character string.
</p>
<p>The <code>stringproc</code> add-on package contains many functions for working with
strings.
</p>
<p>Examples:
</p>
<div class="example">
<pre class="example">(%i1) s_1 : "This is a string.";
(%o1) This is a string.
</pre><pre class="example">(%i2) s_2 : "Embedded \"double quotes\" and backslash \\ characters.";
(%o2) Embedded "double quotes" and backslash \ characters.
</pre><pre class="example">(%i3) s_3 : "Embedded line termination
in this string.";
(%o3) Embedded line termination
in this string.
</pre><pre class="example">(%i4) s_4 : "Ignore the \
line termination \
characters in \
this string.";
(%o4) Ignore the line termination characters in this string.
</pre><pre class="example">(%i5) stringdisp : false;
(%o5) false
</pre><pre class="example">(%i6) s_1;
(%o6) This is a string.
</pre><pre class="example">(%i7) stringdisp : true;
(%o7) true
</pre><pre class="example">(%i8) s_1;
(%o8) "This is a string."
</pre></div>
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Next: <a href="maxima_16.html#Functions-and-Variables-for-Strings" accesskey="n" rel="next">Functions and Variables for Strings</a>, Previous: <a href="maxima_14.html#Strings" accesskey="p" rel="previous">Strings</a>, Up: <a href="maxima_14.html#Strings" accesskey="u" rel="up">Strings</a> [<a href="maxima_toc.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="maxima_423.html#Function-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
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