Verbs that toggle? DM guide confuses me

ID:1281409
 
Jun 1 2013, 10:48 pm
(See the best response by Kaiochao.)
Code:
mob/verb
    intangible()
        density = 0
            if(density = 0)
            density = 1


Problem description:I am really new to coding. I haven't coded anything original, haven't finished the DM Guide (I'm currently at chapter 6) and I believe I just don't grasp this. With my current understanding I think I should be able to make a verb that toggles a num value via if statements (maybe I just don't understand if statements) but I have not come to any conclusions on to how to do this. I've attempted a few things, all have been errors or things that cleared, but resulted in nothing happening.

I'm currently trying to make the intangible() verb a toggle, where if clicked while density is 0 it will restore density to 1 and if density is 0 it will make 0
Jun 1 2013, 11:00 pm
it should be more like:

mob/verb
    intangible()
        if(!usr.density)
            usr.density=1
        else
            usr.density=null
Jun 1 2013, 11:00 pm
 
mob/verb
 Intangible()
  if(!density) density = 1
  else if(density) density = 0
Jun 1 2013, 11:06 pm
Best response
 
mob
    verb/Verb_Name()
        if(condition)
            do this (if [condition] is true)
        else 
            do this (if [condition] is false)


Example:
mob
    verb/Intangible()
        if(density)        //  density is true (1)
            density = 0    //    set density to false (0)
            src << "You've become intangible!"

        else               //  otherwise
            density = 1    //    set density to true (1)
            src << "You're no longer intangible..."
Jun 1 2013, 11:52 pm
Thank you all, this was very helpful.
Jun 2 2013, 12:13 am
In response to Eternal_Memories
Would 
 density = !density
not work better? Since you're already reading !density in your example, and writing to the density var, should come out smoother.