Hi Jörg!

May you explain how to use this:

if myWochentag in [ArrayWochentage] then

—-

because when I try something like 

let myArray:=[1,2,3,4.5];

let y :=5;

if y in [myArray] then... it doesn’t work

thank you

Agiorno,

It's not the same thing. What Jörg describes is how to compare the selected value in a Choice field to another value. The [ArrayWochentage] or [ArrayWeekdays] returns the selection of the Choice field and is a single value. On a side note, the keyword "in" does not appear to work as I had to use "=" instead.  

Interesting behavior... Using a Choice field with days of the week which I called Weekdays, duh, I observed the following...

If Wednesday is selected:

[Weekdays] = 3 is True

number([Weekdays]) = 3 is True

[Weekdays] = "Wednesday" is False

text([Weekdays]) = "Wednesday" is True

Agiorno, I got distracted. Something like this would accomplish what you want if someone isn't able to offer something more concise...

let myArray := [1, 2, 3, 4, 5];
let y := 5;
let myCount := count(myArray);
let i := 0;
let found := false;
while i < myCount and not found do
if y = item(myArray, i) then found := true else i := i + 1 end
end