1TOUPPER(P)                 POSIX Programmer's Manual                TOUPPER(P)
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NAME

6       toupper - transliterate lowercase characters to uppercase
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SYNOPSIS

9       #include <ctype.h>
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11       int toupper(int c);
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DESCRIPTION

15       The  toupper()  function has as a domain a type int, the value of which
16       is representable as an unsigned char or the value of EOF. If the  argu‐
17       ment has any other value, the behavior is undefined. If the argument of
18       toupper() represents a lowercase letter, and there exists a correspond‐
19       ing  uppercase letter  (as defined by character type information in the
20       program locale category LC_CTYPE ),  the result  shall  be  the  corre‐
21       sponding  uppercase  letter.  All  other  arguments  in  the domain are
22       returned unchanged.
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RETURN VALUE

25       Upon successful completion, toupper() shall return the uppercase letter
26       corresponding to the argument passed.
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ERRORS

29       No errors are defined.
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31       The following sections are informative.
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EXAMPLES

34       None.
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APPLICATION USAGE

37       None.
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RATIONALE

40       None.
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FUTURE DIRECTIONS

43       None.
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SEE ALSO

46       setlocale()  ,  the  Base  Definitions  volume of IEEE Std 1003.1-2001,
47       Chapter 7, Locale, <ctype.h>
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50       Portions of this text are reprinted and reproduced in  electronic  form
51       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
52       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
53       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
54       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
55       event of any discrepancy between this version and the original IEEE and
56       The Open Group Standard, the original IEEE and The Open Group  Standard
57       is  the  referee document. The original Standard can be obtained online
58       at http://www.opengroup.org/unix/online.html .
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62IEEE/The Open Group                  2003                           TOUPPER(P)
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