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#include <ctype.h> int tolower(int c);
C/C++ function that returns the lower-case version of the letter represented by c. If c is not an alphabetical, it will be returned unchanged.
#include <ctype.h>
int tolower( int character );
This function converts character from uppercase to lowercase . If character is not 'A' through 'Z' tolower() will simply return character.
Back to Essential C Functions.
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