Formula "ifthen"

[McBrumm]

Hi,
I need help with a formula. I have 3 fields and a checklist

I want to sum field2 and field3, it´s easy

field1 = field2 + field3;

Now I want to sum the 2 fields if the checklist1 = "ok". what does the formula have to look like? I don't get along very well with the "ifthen" function
thank you very much
kind regards

[dimyy]

Example of ifThenElse
weekDays is CheckList field.

ifThenElse(
array\includes(weekDays,datetime\dayOfWeek(datetim e\now())),
description = string\concatenate('Поле дней содержит текущий день: ',datetime\dayOfWeek(datetime\now())) ,
description = 'Поле дней НЕ содержит текущий день'
);

[McBrumm]

Sorry, i don´t get it...
If it´s possible to change the formula with field1, field2, field3 and checklist1 please?

[dimyy]

What type of 'checklist1' field?

[McBrumm]

you mean the value of the checklist? value ="ok"

[dimyy]

ifThen( array\includes(checklist1,'ok'), field1 = field2 + field3);

[McBrumm]

many many thanks