MANPAGES
Skip Quicknav
/ bookworm / allegro5-doc / ALLEGRO_PI(3alleg5)
Scroll to navigation
ALLEGRO_PI - Allegro 5 API
#include <allegro5/allegro.h> #define ALLEGRO_PI 3.14159265358979323846
C99 compilers have no predefined value like M_PI for the constant π, but you can use this one instead.