1ALLEGRO_PI(3)                                                    ALLEGRO_PI(3)
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NAME

6       ALLEGRO_PI - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro.h>
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11              #define ALLEGRO_PI        3.14159265358979323846
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DESCRIPTION

14       C99  compilers  have  no predefined value like M_PI for the constant π,
15       but you can use this one instead.
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19Allegro reference manual                                         ALLEGRO_PI(3)
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