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Standard C Library Functionstolower(3C)


NAME

 tolower - transliterate upper-case characters to lower-case

SYNOPSIS

 
#include <ctype.h> 
int tolower(int c);

DESCRIPTION

 

The tolower() function has as a domain a type int, the value of which is representable as an unsigned char or the value of EOF. If the argument has any other value, the argument is returned unchanged. If the argument of tolower() represents an upper-case letter, and there exists a corresponding lower-case letter (as defined by character type information in the program locale category LC_CTYPE), the result is the corresponding lower-case letter. All other arguments in the domain are returned unchanged.

RETURN VALUES

 

On successful completion, tolower() returns the lower-case letter corresponding to the argument passed. Otherwise, it returns the argument unchanged.

ERRORS

 

No errors are defined.

ATTRIBUTES

 

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
MT-LevelMT-Safe
CSIEnabled

SEE ALSO

 

_tolower(3C), setlocale(3C), attributes(5)


SunOS 5.9Go To TopLast Changed 20 Dec 1996

 
      
      
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.