ios - why i can't change a variable in an if statement with swift?

Question

I have a short question. Why can't I change the value of the var Test in a if statement?

if Status == 1{
    var Test = 1
}
else{
    var Test = 2
}

println(Test) // Error: Use of unresolved identifier 'Test'

Answer 1

because Test is out of your scope. Test is defined in two different if(){} scopes. Declaring Test outside of the if() scope will allow you to access it in a broader scope.

var Test :Int

if Status == 1{
    Test = 1
}
else{
    Test = 2
}

println(Test) 

EDIT: A undeclared variable (Test) cannot be inferred from, therefore recommend to specify variable type (:=Int for integer). If there is any other type of value, an error will be displayed.