143 lines
5.6 KiB
HTML
143 lines
5.6 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
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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 the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: SCAN</title>
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<meta name="description" content="The GNU Fortran Compiler: SCAN">
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<meta name="keywords" content="The GNU Fortran Compiler: SCAN">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<link href="SECNDS.html#SECNDS" rel="next" title="SECNDS">
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<link href="SCALE.html#SCALE" rel="prev" title="SCALE">
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="SCAN"></a>
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<div class="header">
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<p>
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Next: <a href="SECNDS.html#SECNDS" accesskey="n" rel="next">SECNDS</a>, Previous: <a href="SCALE.html#SCALE" accesskey="p" rel="prev">SCALE</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="SCAN-_002d_002d_002d-Scan-a-string-for-the-presence-of-a-set-of-characters"></a>
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<h3 class="section">9.227 <code>SCAN</code> — Scan a string for the presence of a set of characters</h3>
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<a name="index-SCAN"></a>
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<a name="index-string_002c-find-subset"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Scans a <var>STRING</var> for any of the characters in a <var>SET</var>
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of characters.
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</p>
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<p>If <var>BACK</var> is either absent or equals <code>FALSE</code>, this function
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returns the position of the leftmost character of <var>STRING</var> that is
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in <var>SET</var>. If <var>BACK</var> equals <code>TRUE</code>, the rightmost position
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is returned. If no character of <var>SET</var> is found in <var>STRING</var>, the
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result is zero.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>Fortran 95 and later, with <var>KIND</var> argument Fortran 2003 and later
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Elemental function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>RESULT = SCAN(STRING, SET[, BACK [, KIND]])</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>STRING</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
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<tr><td width="15%"><var>SET</var></td><td width="70%">Shall be of type <code>CHARACTER</code>.</td></tr>
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<tr><td width="15%"><var>BACK</var></td><td width="70%">(Optional) shall be of type <code>LOGICAL</code>.</td></tr>
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<tr><td width="15%"><var>KIND</var></td><td width="70%">(Optional) An <code>INTEGER</code> initialization
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expression indicating the kind parameter of the result.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>The return value is of type <code>INTEGER</code> and of kind <var>KIND</var>. If
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<var>KIND</var> is absent, the return value is of default integer kind.
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</p>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">PROGRAM test_scan
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WRITE(*,*) SCAN("FORTRAN", "AO") ! 2, found 'O'
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WRITE(*,*) SCAN("FORTRAN", "AO", .TRUE.) ! 6, found 'A'
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WRITE(*,*) SCAN("FORTRAN", "C++") ! 0, found none
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END PROGRAM
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</pre></div>
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</dd>
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<dt><em>See also</em>:</dt>
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<dd><p><a href="INDEX-intrinsic.html#INDEX-intrinsic">INDEX intrinsic</a>, <a href="VERIFY.html#VERIFY">VERIFY</a>
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</p></dd>
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</dl>
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</body>
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</html>
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