The function returns the corresponding lowercase letter if one exists and if isupper(c); otherwise, it returns c.
Return Value
The function returns the corresponding lowercase letter if one exists and if isupper(c); otherwise, it returns c.
Example
#include <stdio.h>
int main() {
printf( "Lower case of A is %c\n", tolower('A'));
printf( "Lower case of 9 is %c\n", tolower('9'));
printf( "Lower case of g is %c\n", tolower('g'));
return 0;
}
It will proiduce following result:
Lower case of A is a
Lower case of 9 is 9
Lower case of g is g
