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.TH "ALLEGRO_PI" "3alleg5" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
ALLEGRO_PI - Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include <allegro5/allegro.h>

#define ALLEGRO_PI        3.14159265358979323846
\f[R]
.fi
.SH DESCRIPTION
.PP
C99 compilers have no predefined value like M_PI for the constant π, but
you can use this one instead.