Variable Is Not Incrementing

Question

I have to make some calculus based on two dates and the user says if it should calc the initial month or not.

My code is like this:

 let qtMeses = getMonthDifference( dateaq!, d2: datebase! )
    if ( proprioMesSwitch.on  ){
      let qtMeses = qtMeses + 1
    }

The routine count how many month between the two dates and check to see if the user checked the initial month option.

Say the qtMeses variable has a value of 20 after calling the getMonthDifference procedure. After it tests the proprioMesSwitch and executes the let qtMeses = qtMeses + 1 line but even though the result after that is still the same 20.

Mario Zannone · Answer 1 · 2015-07-24T18:41:54.427

2

With let ... you define a new variable qtMeses, hiding the outer one.

Use:

var qtMeses = getMonthDifference( dateaq!, d2: datebase! )
if (proprioMesSwitch.on) {
   qtMeses = qtMeses + 1
}

edited Jul 24 '15 at 18:41

answered Jul 24 '15 at 18:33

Mario Zannone

2,843
12
18

1

And then if he increments, he should use var instead of let, because let defines a constant. http://stackoverflow.com/questions/24002092/what-is-the-difference-between-let-and-var-in-swift – Swift Rabbit Jul 24 '15 at 18:37
@SwiftRabbit Oops! You are correct. I will update the snippet. – Mario Zannone Jul 24 '15 at 18:41
I saw your answer when I posted mine. :) Thanks. – ReginaldoRigo Jul 24 '15 at 18:46

score 0 · Answer 2 · edited Apr 08 '21 at 12:33

0

Even though I have declared a variable qtMeses with var qtMeses I used let qtMeses to assign a value to this variable.

But because of let qtMeses swift changed my var into a constant thats why I couldnt change its value anymore.

qtMeses = getMonthDifference( dateaq!, d2: datebase! )
if ( proprioMesSwitch.on  ){
  qtMeses = qtMeses + 1
}

edited Apr 08 '21 at 12:33

Nimantha

6,405
6
28
69

answered Jul 24 '15 at 18:37

ReginaldoRigo

11
2

Variable Is Not Incrementing

2 Answers2