To find the first element of an array in Swift, you can use the first property. Here's an example:
let array = [1, 2, 3, 4, 5]
let firstElement = array.first
print(firstElement) // Output: Optional(1)
In this example, we have an array of integers [1, 2, 3, 4, 5]. We use the first property of the array to get the first element of the array and assign that value to the firstElement constant.
Notice that the first property returns an optional value, which means it could return nil if the array is empty. To handle that case, you can use an if let statement or a nil coalescing operator (??) to provide a default value:
let emptyArray = [Int]()
let firstElement = emptyArray.first ?? 0
print(firstElement) // Output: 0
In this case, we have an empty array of integers. We try to get the first element of the array using the first property, but that would return nil. Therefore, we use the nil coalescing operator (??) to provide a default value of 0 in case the array is empty. The result of the firstElement constant is 0.