tolower, _tolower, towlower
Visual Studio .NET 2003
Convert character to lowercase.
int tolower( int c ); int _tolower( int c ); int towlower( wint_t c );
Parameters
- c
- Character to convert.
Return Value
Each of these routines converts a copy of c, if possible, and returns the result. There is no return value reserved to indicate an error.
Remarks
Each of these routines converts a given uppercase letter to a lowercase letter if possible and appropriate.
In order for tolower to give the expected results, __isascii and isupper must both return nonzero.
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| tolower | <stdlib.h> and <ctype.h> | ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP |
| _tolower | <ctype.h> | Win 98, Win Me, Win NT, Win 2000, Win XP |
| towlower | <ctype.h> or <wchar.h> | ANSI, Win 98, Win Me, Win NT, Win 2000, Win XP |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
Example
See the example in to Functions.
See Also
Data Conversion Routines | is Routines | to Functions Overview | Run-Time Routines and .NET Framework Equivalents
