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TOLOWER(3)               BSD Library Functions Manual               TOLOWER(3)

     tolower, tolower_l -- upper case to lower case letter conversion

     Standard C Library (libc, -lc)

     #include <ctype.h>

     tolower(int c);

     #include <ctype.h>
     #include <xlocale.h>

     tolower_l(int c, locale_t loc);

     The tolower() function converts an upper-case letter to the corresponding lower-case letter.  The argu-ment argument
     ment must be representable as an unsigned char or the value of EOF.

     Although the tolower() function uses the current locale, the tolower_l() function may be passed a
     locale directly. See xlocale(3) for more information.

     If the argument is an upper-case letter, the tolower() function returns the corresponding lower-case
     letter if there is one; otherwise, the argument is returned unchanged.

     The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales
     with large character sets is considered obsolete and may not be supported in future releases.  The
     towlower() function should be used instead.

     ctype(3), islower(3), towlower(3), xlocale(3)

     The tolower() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

BSD                              July 17, 2005                             BSD

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