Arcade Expression Error

[AndyIngall]

I have the following Arcade expression to calculate the difference between two dates

var DateRec = $feature.DATEAPRECV
var DateVal =$feature.DATEAPVAL
var ValDays = DateDiff(DateVal, DateRec, 'Days');
return ValDays + " day";

What i have tried   to do is add in an IF clause to change the day to days if ValDays => 2 but get errors regard parenthesis 

var DateRec = $feature.DATEAPRECV
var DateVal =$feature.DATEAPVAL
var ValDays = DateDiff(DateVal, DateRec, 'Days');
if (ValDays = 1)
return ValDays + " day";
else if (ValDays => 2)
return ValDays + " days";

The error is 

Invalid expression.
Error on line 4.
Close parenthesis expected

Can anyone please explain what is wrong??

[CodyPatterson · Accepted solution]

Hey @AndyIngall 

It seems that your comparison operator is in the wrong order and you may be attempting to make an assignment instead of a comparison in your if statement, you would also need to include curly brackets as this is required to encapsulate any return statement, this is what I ended up getting to work here:

var DateRec = $feature.DATEAPRECV;
var DateVal = $feature.DATEAPVAL;
var ValDays = DateDiff(DateVal, DateRec, 'Days');

if (ValDays == 1) {
    return ValDays + " day";
} else if (ValDays >= 2) {
    return ValDays + " days";
}

Hope that helps!

Cody

[AndyIngall]

Thanks very much, ideal...

[KenBuja]

You could also use this syntax

var DateRec = $feature.DATEAPRECV;
var DateVal = $feature.DATEAPVAL;
var ValDays = DateDiff(DateVal, DateRec, 'Days');

return `${ValDays } ${iif(Abs(ValDays) == 1, 'day', 'days')}`