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<refentry id="strsubk">
<indexterm id="Indexstrsubk"><primary>strsubk</primary></indexterm>
<refentryinfo><title>Strings:Manipulation</title></refentryinfo>
<refmeta>
<refentrytitle>strsubk</refentrytitle>
</refmeta>
<refnamediv>
<refname>strsubk</refname>
<refpurpose>
Extract a substring
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Return a substring of the source string. strsubk runs both at init and
performance time.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>Sdst <command>strsubk</command> Ssrc, kstart, kend</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>kstart</emphasis>
-- start position in Ssrc, counting from 0.
A negative value means the end of the string.
</para>
<para>
<emphasis>kend</emphasis>
-- end position in Ssrc, counting from 0.
A negative value means the end of the string. If kend is less than
kstart, the output is reversed.
</para>
</refsect1>
<refsect1>
<title>See also</title>
<para><link linkend="strsub"><citetitle>strsub</citetitle></link></para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: Istvan Varga</member>
<member>2006</member>
</simplelist>
</para>
</refsect1>
</refentry>
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