utolower - Converts a letter to lower case. Allegro game programming library.

       This function returns `c', converting it to lower case if it is upper case.

       utolower - Converts a letter to lower case. Allegro game programming library.

utoupper(3alleg4),  ugetc(3alleg4),  ugetx(3alleg4),  usetc(3alleg4),  uwidth(3alleg4), ucwidth(3alleg4),
       uisok(3alleg4)

Allegro                                           version 4.4.3                                utolower(3alleg4)

#include<allegro.h>intutolower(intc);