---
name: "ALLEGRO_PI"
section: "3"
platform: "linux"
package: "allegro"
version: "5.2.11.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/ALLEGRO_PI"
---

# ALLEGRO\_PI(3)

Allegro 5 API

## NAME

ALLEGRO\_PI - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  #define ALLEGRO_PI        3.14159265358979323846
  ```

## DESCRIPTION

C99 compilers have no predefined value like M\_PI for the constant π, but you can use this one instead.