Loading...

How to iterate an array in reverse in Swift?

question swift
Ram Patra Published on August 9, 2020
Version - Swift 5.0+

From Swift 5.0, you can use any of the following approaches to iterate an array in reverse.

A. Using reversed() method:

Example 1:

let numbers = (0 ... 3).reversed()

for num in numbers {
    print(num)
}

Output:

3
2
1
0

Example 2:

let languages = ["Java", "Swift", "Go"]

for language in languages.reversed() {
    print("\(language)")
}

Output:

Go
Swift
Java

B. Using stride() method:

Example 1:

let sequence = stride(from: 3, to: -1, by: -1)

for index in sequence {
    print(index)
}

Output:

3
2
1
0
Presentify

Take your presentation to the next level.

FaceScreen

Put your face and name on your screen.

KeyScreen

Show keypresses on your screen.

ToDoBar

Your to-dos on your menu bar.

SimpleFill

Fill forms using your right-click menu.

IconSim

Preview your Mac app icons.

Ram Patra Published on August 9, 2020
Image placeholder

Keep reading

If this article was helpful, others might be too

question macOS swift August 14, 2020 How to quit or close an app in macOS using Swift?

You can quit or exit an app with:NSApp.terminate(self)

question swift macOS October 29, 2023 How to make Color conform to RawRepresentable in SwiftUI in macOS?

For various reasons you may want to convert the Color type to a String. And, below is a relatively cleaner way to do it.

question swiftui swift October 7, 2024 How to zoom in and zoom out a SwiftUI view?

In a macOS or iOS app, you can easily add a zoom feature to any SwiftUI view with the scaleEffect modifier. In the below example, I am using a Slider to control the zoom level. Here’s how you can implement zooming in and out with a slider:

Like my work?

Please, feel free to reach out. I would be more than happy to chat.