debian man page for vector_length

vector_length(3alleg4)						  Allegro manual					    vector_length(3alleg4)

NAME
       vector_length, vector_length_f - Calculates the length of a vector. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       fixed vector_length(fixed x, fixed y, fixed z);

       float vector_length_f(float x, float y, float z);

DESCRIPTION
       Calculates the length of the vector (x, y, z), using that good 'ole Pythagoras theorem.

SEE ALSO
       normalize_vector(3alleg4)

Allegro 							   version 4.4.2					    vector_length(3alleg4)