Indexed array not printing elements in array - arrays

Question

My code below is trying to index every new entry to the array when the button is pressed. So automatically sort the element when the button is pressed.
var arrayOfInt = [Int]()
#IBAction func submitText(_ sender: Any) {
if let text = enterText.text {
if let number = Int(text) {
var index = 0
for num in arrayOfInt {
if num > number {
arrayOfInt.insert(number, at: index)
break
}
index += 1
}
print(arrayOfInt)
} else {
print("Please enter number")
}
}}
When printed this is what is coming out []. None of the numbers are printed.

Answer 1

Initially arrayOfInt is empty array. So it will never go inside this as the array is empty
for num in arrayOfInt {
//Whatever is here
}
Your logic is also wrong for whatever you are trying to achieve.
Array has already sort(by:(Element, Element) -> Bool) method
You better write the code as follows:-
var arrayOfInt = [Int]()
#IBAction func submitText(_ sender: Any) {
if let text = enterText.text , let number = Int(text) {
arrayOfInt.append(number)
arrayOfInt.sort { return $0 > $1 } //Modify accordingly the order you want
print(arrayOfInt)
} else {
print("Please enter number")
}
}

Answer 2

Your arrayOfInt variable has no elements, it's empty... so the for loop won't iterate over a zero index array, it would have no sense... that's why the code inside the curly brackets is never executed.
If you would have debugged your code with either a breakpoint or using a print statement this issue would have been shown by itself.
I would avoid using if let every time the guard statement could solve the same. Basically because it looks more readable and it's kind of the Swift approach... at the same time you are avoiding the pyramid of doom.
My suggestion would be:
var arrayOfInt = [Int]()
#IBAction func submitText(_ sender: Any) {
guard let text = enterText.text else {
print("Please enter a number")
return
} // guard
guard let number = Int(text) else {
print("Can't creates an integer value from the given string.")
return
} // guard
arrayOfInt.append(number)
arrayOfInt.sort() // From lowest to highest by default.
//arrayOfInt.sort { $0 < $1 } // From lowest to highest using a higher order function.
//arrayOfInt.sort { $0 > $1 } // From highest to lowest using a higher order function.
} // submitText