field not found - Error

Hi!

where is the error?

let a := Testo
if a = null then
    let b := "zero"
    else
        let b := "molti"
        end;
    alert(b)

Field not found in line 7

Thanks!

You have to put the alert inside the then and else parts.

let a := Testo
if a = null then
    let b := "zero";
    alert(b)
else
    let b := "molti";
    alert(b)
end;

Or you can do:

let a := Testo
alert(if a = null then
     "zero"
 else
     "molti"
 end)

Content aside