Understanding the ForEach Loop in SwiftUI

What is forEach?

forEach is a special function that belongs to collections like arrays and dictionaries. It helps you loop through each element in a collection and do something with it, such as printing it or performing an action.

Here’s the basic format of forEach:

A Simple Example:

Let’s say we have a list of numbers, and we want to print them one by one. We can use forEach to do this easily:

let numbers = [1, 2, 3, 4, 5]

numbers.forEach { number in
    print(number)
}

This will print:

1
2
3
4
5

Easy, right? The forEach loop helps you go through each number in the list and print it.

Difference between for-in and forEach:

for-in allows you to break out of the loop with break or continue, while forEach does not support this.

forEach uses a closure, which may add slight overhead compared to a for-in loop, but it's often used for its concise syntax.