stayCreate a named constant with a value.
# stay [name] = [value]
stay EXAMPLE = "This value can never be changed or reassigned";
The value of an constant can never be modified.
stay X = 10;
stay X = 20; # this line causes an error
obj X = 20; # this line will also cause an error
In practice, it is best to make the constant name all uppercase, and keep it globally available.
stay MY_CONSTANT = 10;