Apple has removed the ++

Example:

var x = 1

//Increment
x += 1 //Means x = x + 1

Similarly for decrement operator --, you need to write -=

Example:

var x = 1

//Decrement
x -= 1 //Means x = x - 1

For for loops:

Increment Example:

Instead of

for var index = 0; index < 3; index ++ {
    print("index is \(index)")
}

You can write:

//Example 1
for index in 0..<3 {
    print("index is \(index)")
}

//Example 2
for index in 0..<someArray.count {
    print("index is \(index)")
}

//Example 3
for index in 0...(someArray.count - 1) {
    print("index is \(index)")
}

Decrement Example:

for var index = 3; index >= 0; --index {
   print(index)
}

You can write:

for index in 3.stride(to: 1, by: -1) {
   print(index)
}
//prints 3, 2

for index in 3.stride(through: 1, by: -1) {
   print(index)
}
//prints 3, 2, 1

for index in (0 ..< 3).reverse() {
   print(index)
}

for index in (0 ... 3).reverse() {
   print(index)
}

SWIFT 3

Apple has removed the ++