Documentation for prefix constant assembled from the following pages:
Language documentation: Variables §
From Variables
(Variables) prefix constant §
The constant prefix declares that the value it tags is not going to change during its lifetime.
constant = pi * 2; = 6; # OUTPUT: «(exit code 1) Cannot assign to an immutable value The value is assigned at compile time. Since Raku modules are precompiled automatically, constants defined in modules are not re-evaluated when the program is run. Please check the section on constants in the Terms page for additional information.