Swift range operator for i = mymax; i >= 0 i--

Question

I facing problem in executing for loop in Swift 3. I can use loop for range operator ... and ..< but in may case, I want something like ..> but its not available.

How do I execute following loop in Swift 3?

var myMax = 20
for var i = myMax ; i >= 0 ; i -= 1 {
   ...
}

Answer 1

It's easy to reverse the loop. User reversed function.

Swift 3

let myMax = 20
for i in (1..<myMax).reversed() {
    print(i)
}

You can also use stride as @ZaidPathan said :

This question have all answers with all versions : How to iterate for loop in reverse order in swift?

Answer 2

for i in (1..<20).reversed() {
    print(i)
}

Hope it helps.Read More

Answer 3

Swift 3, You can use stride

var myMax = 20
for var i = myMax ; i > 0 ; i -= 1 {

}

//Equivalent

let myMax = 20
for value in stride(from: 20, to: 0, by: -1){
    print(value)
}

var myMax = 20
for var i = myMax ; i >= 0 ; i -= 1 {

}

//Equivalent

for value in stride(from: 20, through: 0, by: -1){
    print(value)
}