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+<TITLE>toupper</TITLE>
+<body bgcolor="#ffffcc">
+<hr>
+<pre>
+
+
+
+<h3>TOUPPER(3) Linux Programmer's Manual TOUPPER(3)
+</h3>
+
+<h3>NAME
+</h3> toupper, tolower - convert letter to upper or lower case
+
+<h3>SYNOPSIS
+</h3> #include &lt;ctype.h&gt;
+
+ int toupper (int c);
+ int tolower (int c);
+
+<h3>DESCRIPTION
+</h3> toupper() converts the letter c to upper case, if possi-
+ ble.
+
+ tolower() converts the letter c to lower case, if possi-
+ ble.
+
+<h3>RETURN VALUE
+</h3> The value returned is that of the converted letter, or c
+ if the conversion was not possible.
+
+<h3>CONFORMS TO
+</h3> ANSI - C, BSD 4.3
+
+<h3>BUGS
+</h3> The details of what constitutes an uppercase or lowercase
+ letter depend on the current locale. For example, the
+ default "C" locale does not know about umlauts, so no con-
+ version is done for them.
+
+ In some non - English locales, there are lowercase letters
+ with no corresponding uppercase equivalent; the German
+ sharp s is one example.
+
+</pre>
+<hr>
+<h3>SEE ALSO
+</h3><p>
+<a href=../EXAMPLES/is_examp.c>isalpha</a>,
+<a href=setlocale.htm>setlocale</a>,
+<a href=locale.htm>locale</a>,
+<pre>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+<h3>GNU April 4, 1993 1
+</h3>
+
+ </pre>
+<P>
+<hr>
+<p>
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