append array in swift

To append an element to an array in Swift, you can use the append method provided by Swift's Array type. The append method will add the new element to the end of the array.

Here's an example:

main.swift
var myArray = [1, 2, 3]
myArray.append(4)
print(myArray) // [1, 2, 3, 4]
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4 lines

In the example above, we first define an array myArray containing the elements 1, 2, and 3. We then call the append method on myArray, passing in the value 4 as the argument. The append method then adds the value 4 to the end of myArray.

It's worth noting that the append method mutates the array, meaning that it modifies the original array rather than returning a new array with the new element added. If you want to create a new array with an element added, you could use the + operator, like this:

main.swift
let myArray = [1, 2, 3]
let newArray = myArray + [4]
print(newArray) // [1, 2, 3, 4]
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4 lines

In this example, we define an immutable array myArray, then create a new array called newArray by concatenating myArray with an array containing only the element 4. The result is a new array containing the elements 1, 2, 3, and 4.