1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_atof">
<refmeta>
<refentrytitle>atof</refentrytitle>
<refmiscinfo>number</refmiscinfo>
</refmeta>
<refnamediv>
<refname>atof</refname>
<refpurpose>Convert a string to single precision float</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_atof">
<funcprototype id="fproto_atof">
<funcdef><function>atof</function></funcdef>
<paramdef>in <parameter>arg</parameter> string</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_atof">
<title>Description</title>
<para>atof returns its argument as a single precision floating point.
If the string cannot be parsed and converted to a valid
float, a value 0.0 is returned.</para>
</refsect1>
<refsect1 id="params_atof"><title>Parameters</title>
<refsect2><title><parameter>arg</parameter></title>
<para>A string input parameter</para>
</refsect2>
</refsect1>
<refsect1 id="ret_atof"><title>Return Types</title>
<para>Single precision floating point</para>
</refsect1>
<refsect1 id="examples_atof"><title>Examples</title>
<example id="ex_atof"><title>Simple examples</title>
<screen>
SQL> select atof('1.23456789');
callret
REAL
_______________________________________________________________________________
1.234568
1 Rows. -- 5 msec.
SQL> select atof ('Cadena de los patos amarillos');
callret
REAL
_______________________________________________________________________________
0.000000
1 Rows. -- 4 msec.
SQL> select atof (sprintf ('%f', 2.3423));
callret
REAL
_______________________________________________________________________________
2.342300
1 Rows. -- 5 msec.
</screen>
</example>
</refsect1>
<refsect1 id="seealso_atof"><title>See Also</title>
<para><function><link linkend="fn_atoi">atoi</link></function></para>
</refsect1>
</refentry>
|
