Help with toggle value/function

[Etupa]

Hi here, need your help I've messed up with else if or etc make 0 1 as a var... don't get it at all ;_;

I'm trying to make a toggle function with one keybinds, bindings.xml part is ok for me but have no more idea for lua... u_u

Basicaly, I want 0 became 1 or 1 became 0 ... ^^;

local function helm()   
        local control = ZO_OptionsWindow.controlTable[3][8]
        SetSetting(control.system, control.settingId, 0)    
    end
--or
 
    local function nohelm() 
        local control = ZO_OptionsWindow.controlTable[3][8]
        SetSetting(control.system, control.settingId, 1)    
    end

Thanks for your help :c




Edit :
where I am now ... ; ;

function toghelm()
local control = ZO_OptionsWindow.controlTable[3][8]
SetSetting(control.system, control.settingId, (var))
    var = x
        if x == 0 then return nohelm()
        elseif x == 1 then return helm()
    end
 
end
            
    local function helm()   
        local control = ZO_OptionsWindow.controlTable[3][8]
        SetSetting(control.system, control.settingId, 0)    
    end
    local function nohelm() 
        local control = ZO_OptionsWindow.controlTable[3][8]
        SetSetting(control.system, control.settingId, 1)    
    end

tried also something like

function toghelm()
local control = ZO_OptionsWindow.controlTable[3][8]
SetSetting(control.system, control.settingId, (var))
   var = helmvar
      if helmvar == 1 then var = 0
      elseif helmvar == 0 then var = 1
   end
end

Well, those always return 0 (helm is on) ... but can't catch the way to make 0 to 1 et 1 to 0 at function execution ^^;


one more try...

function toghelm()
    local control = ZO_OptionsWindow.controlTable[3][8]
        local helmstate = GetSetting(control.system, control.settingId)
        if helmstate == 1 then return helm()
        elseif helmstate == 0 then return nohelm()  
    end
end
 
            
local function helm()   
    local control = ZO_OptionsWindow.controlTable[3][8]
    SetSetting(control.system, control.settingId, 0)    
end
 
local function nohelm() 
    local control = ZO_OptionsWindow.controlTable[3][8]
    SetSetting(control.system, control.settingId, 1)    
end

really don't get it