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_toupper(3c)

Standard C Library Functions                                      _toupper(3C)



NAME
       _toupper - transliterate lowercase characters to uppercase

SYNOPSIS
       #include <ctype.h>

       int _toupper(int c);

DESCRIPTION
       The _toupper() macro is equivalent to toupper(3C) except that the argu‐
       ment c must be a lowercase letter.

RETURN VALUES
       On successful completion, _toupper() returns the uppercase letter  cor‐
       responding to the argument passed.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ CSIEnabled _ Interface StabilityStandard _  MT-LevelMT-
       Safe


SEE ALSO
       islower(3C), toupper(3C), attributes(7), standards(7)

NOTES
       The Single UNIX Specification, Version 4 standard marked this interface
       obsolescent.



Oracle Solaris 11.4               11 May 2021                     _toupper(3C)
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