tolower, _mbctolower, towlower
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Header File
ctype.h, mbstring.h
Category
Conversion Routines
Prototype
int tolower(int ch);
int towlower(wint_t ch); // Unicode version
unsigned int _mbctolower(unsigned int c);
Description
Translates characters to lowercase.
tolower is a function that converts an integer ch (in the range EOF to 255) to its lowercase value (a to z; if it was uppercase, A to Z). All others are left unchanged.
Return Value
tolower returns the converted value of ch if it is uppercase; it returns all others unchanged.
Example
#include <string.h> #include <stdio.h> #include <ctype.h> int main(void) { int length, i; char *string = "THIS IS A STRING"; length = strlen(string); for (i=0; i<length; i++) { string[i] = tolower(string[i]); } printf("%s\n",string); return 0; }
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
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tolower |
+ |
+ |
+ |
+ |
_mbctolower |
+ |
|||
towlower |
+ |
+ |
+ |