146 lines
5.6 KiB
HTML
146 lines
5.6 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation; with the
|
||
|
|
Invariant Sections being "Funding Free Software", the Front-Cover
|
||
|
|
Texts being (a) (see below), and with the Back-Cover Texts being (b)
|
||
|
|
(see below). A copy of the license is included in the section entitled
|
||
|
|
"GNU Free Documentation License".
|
||
|
|
|
||
|
|
(a) The FSF's Front-Cover Text is:
|
||
|
|
|
||
|
|
A GNU Manual
|
||
|
|
|
||
|
|
(b) The FSF's Back-Cover Text is:
|
||
|
|
|
||
|
|
You have freedom to copy and modify this GNU Manual, like GNU
|
||
|
|
software. Copies published by the Free Software Foundation raise
|
||
|
|
funds for GNU development. -->
|
||
|
|
<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>The GNU Fortran Compiler: SQRT</title>
|
||
|
|
|
||
|
|
<meta name="description" content="The GNU Fortran Compiler: SQRT">
|
||
|
|
<meta name="keywords" content="The GNU Fortran Compiler: SQRT">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content="makeinfo">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
|
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
|
||
|
|
<link href="SRAND.html#SRAND" rel="next" title="SRAND">
|
||
|
|
<link href="SPREAD.html#SPREAD" rel="prev" title="SPREAD">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.indentedblock {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
||
|
|
div.smalllisp {margin-left: 3.2em}
|
||
|
|
kbd {font-style:oblique}
|
||
|
|
pre.display {font-family: inherit}
|
||
|
|
pre.format {font-family: inherit}
|
||
|
|
pre.menu-comment {font-family: serif}
|
||
|
|
pre.menu-preformatted {font-family: serif}
|
||
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smallexample {font-size: smaller}
|
||
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smalllisp {font-size: smaller}
|
||
|
|
span.nocodebreak {white-space:nowrap}
|
||
|
|
span.nolinebreak {white-space:nowrap}
|
||
|
|
span.roman {font-family:serif; font-weight:normal}
|
||
|
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
||
|
|
<a name="SQRT"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="SRAND.html#SRAND" accesskey="n" rel="next">SRAND</a>, Previous: <a href="SPREAD.html#SPREAD" accesskey="p" rel="prev">SPREAD</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>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="SQRT-_002d_002d_002d-Square_002droot-function"></a>
|
||
|
|
<h3 class="section">9.247 <code>SQRT</code> — Square-root function</h3>
|
||
|
|
<a name="index-SQRT"></a>
|
||
|
|
<a name="index-DSQRT"></a>
|
||
|
|
<a name="index-CSQRT"></a>
|
||
|
|
<a name="index-ZSQRT"></a>
|
||
|
|
<a name="index-CDSQRT"></a>
|
||
|
|
<a name="index-root"></a>
|
||
|
|
<a name="index-square_002droot"></a>
|
||
|
|
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><em>Description</em>:</dt>
|
||
|
|
<dd><p><code>SQRT(X)</code> computes the square root of <var>X</var>.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><em>Standard</em>:</dt>
|
||
|
|
<dd><p>Fortran 77 and later
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><em>Class</em>:</dt>
|
||
|
|
<dd><p>Elemental function
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><em>Syntax</em>:</dt>
|
||
|
|
<dd><p><code>RESULT = SQRT(X)</code>
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><em>Arguments</em>:</dt>
|
||
|
|
<dd><table>
|
||
|
|
<tr><td width="15%"><var>X</var></td><td width="70%">The type shall be <code>REAL</code> or
|
||
|
|
<code>COMPLEX</code>.</td></tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
</dd>
|
||
|
|
<dt><em>Return value</em>:</dt>
|
||
|
|
<dd><p>The return value is of type <code>REAL</code> or <code>COMPLEX</code>.
|
||
|
|
The kind type parameter is the same as <var>X</var>.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><em>Example</em>:</dt>
|
||
|
|
<dd><div class="smallexample">
|
||
|
|
<pre class="smallexample">program test_sqrt
|
||
|
|
real(8) :: x = 2.0_8
|
||
|
|
complex :: z = (1.0, 2.0)
|
||
|
|
x = sqrt(x)
|
||
|
|
z = sqrt(z)
|
||
|
|
end program test_sqrt
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
</dd>
|
||
|
|
<dt><em>Specific names</em>:</dt>
|
||
|
|
<dd><table>
|
||
|
|
<tr><td width="20%">Name</td><td width="20%">Argument</td><td width="20%">Return type</td><td width="25%">Standard</td></tr>
|
||
|
|
<tr><td width="20%"><code>SQRT(X)</code></td><td width="20%"><code>REAL(4) X</code></td><td width="20%"><code>REAL(4)</code></td><td width="25%">Fortran 95 and later</td></tr>
|
||
|
|
<tr><td width="20%"><code>DSQRT(X)</code></td><td width="20%"><code>REAL(8) X</code></td><td width="20%"><code>REAL(8)</code></td><td width="25%">Fortran 95 and later</td></tr>
|
||
|
|
<tr><td width="20%"><code>CSQRT(X)</code></td><td width="20%"><code>COMPLEX(4) X</code></td><td width="20%"><code>COMPLEX(4)</code></td><td width="25%">Fortran 95 and later</td></tr>
|
||
|
|
<tr><td width="20%"><code>ZSQRT(X)</code></td><td width="20%"><code>COMPLEX(8) X</code></td><td width="20%"><code>COMPLEX(8)</code></td><td width="25%">GNU extension</td></tr>
|
||
|
|
<tr><td width="20%"><code>CDSQRT(X)</code></td><td width="20%"><code>COMPLEX(8) X</code></td><td width="20%"><code>COMPLEX(8)</code></td><td width="25%">GNU extension</td></tr>
|
||
|
|
</table>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|