const vars

The const type modifier defines a constant value. This may be useful for centralizing the location of a value that is used repeatedly so that it can be easily configured. It has the advantage over #define macros of obeying the normal scope rules for variables. This means, for example, that a const variable declared inside a proc will not conflict with other variables declared elsewhere.

mob
    var/const/max_items = 100
 
    Enter(O)
        if(src.contents.len >= src.max_items)
            return 0
        return ..()

This example defines an upper limit on the number of items a mob may carry.

See also