Conditional odd / even parameters associate with Lenght parameters

[strange4ride]

Good Evening, so my task is this one, i have a whole number parameter, and every time this whole number be odd, i want de lenghth parameter associated be "X" value, and every time be even, the length value is zero or an infinitesimal number, ive alrealdy made even and odd parameters, anda until now these lines were constructed

Parameter = X

Even = rounddown(Parameter/ 2) = roundup(Parameter / 2)

Odd = not([Even])

Length 3 = Length / Lenght 3

Now, the is a way to associate the (odd) to (Lenght 3) in a way that every time the odd parameter is activated length 3 is = the equation presented and every time is not (Odd) Length 3 is = 0?

If i dididnt manage to provide a great clarification, please be welcome to say that i try to contextualize better, thanks for the attention

[strange4ride]

A Quick correction, the length 3 parameter is...
Length 3 = Length / Length 2

[barthbradley]

Hard to understand. Are you doing this in an itemized schedule with Calculated Parameters? That might explain a few things.  

Got any screenshots?  

[Alfredo_Medina]

Your question is not clear. Do you have a way to know if a number is odd or even? The way that you describe above, is that a formula that works, or are you just describing how it should work?

When you write: Even = rounddown(Parameter/ 2) = roundup(Parameter / 2)

What kind of parameter is Even? What kind or formula is that with two equal symbols?

[strange4ride]

Há yeah, its for a parametric family that i am programing, an generic model, an wardrobe, with pairs of dors, but i want to program a way tô show a lonely odd dor in the end If i wish on the project, Ive already made It before with other methods, but i looking for a way tô make It better

[Alfredo_Medina]

ok, now I have a better understanding of what you're doing. The first part is like this:

[strange4ride]

Even is the name that i gave It to the parameter, and the way that i find tô make Revit knows when some númber is even is this formula
rounddown(Parameter/ 2) = roundup(Parameter / 2)
If the númber is diferent from even "not(even)" the númber is odd

[Alfredo_Medina · Accepted solution]

The other part would be like this:  (units as metric, for clarity)

[strange4ride]

Yeah, thanks for share the schedulle, Mine where Full of layers of parameters associated one tô another on my native linguage.

I will try enable this solution as sono as possible, thanks 

[Alfredo_Medina]

Another way to know if an integer is odd or even is this: (highlighted)