<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 <ctype.h> 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> <center> <table border=2 width=80%> <tr align=center> <td width=25%> <a href=../index.htm>Top</a> </td><td width=25%> <a href=../master_index.html>Master Index</a> </td><td width=25%> <a href=../SYNTAX/keywords.html>Keywords</a> </td><td width=25%> <a href=../FUNCTIONS/index.htm>Functions</a> </td> </tr> </table> </center> <p> <hr> This manual page was brought to you by <i>mjl_man V-2.0</i>
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