Getting the first n elements from a array in Swift

Learn, how to get the first n elements from an array in swift.

Consider, we have a following array:

var arr = [10, 20, 30, 40, 50, 60, 70]

To access the first n elements from an above array, we can use the prefix() method by passing the required number of elements as an argument to it.

Here is an example, that gets the first 3 elements of an array.

var arr = [10, 20, 30, 40, 50, 60, 70]

let firstThree  = arr.prefix(3)

print(firstThree)

Output:

[10, 20, 30]

Similarly, we can also use the Array subscript syntax [ ] like this.

var arr = [10, 20, 30, 40, 50, 60, 70]

let firstThree  = arr[...3]

print(firstThree)