---
title: "append(contentsOf:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/contiguousarray/append(contentsof:)"
---

# append(contentsOf:)

Adds the elements of a sequence to the end of the array.

## Declaration

```swift
mutating func append<S>(contentsOf newElements: S) where Element == S.Element, S : Sequence
```

## Parameters

- `newElements`: The elements to append to the array.

## Discussion

Discussion Use this method to append the elements of a sequence to the end of this array. This example appends the elements of a Range<Int> instance to an array of integers. var numbers = [1, 2, 3, 4, 5] numbers.append(contentsOf: 10...15) print(numbers) // Prints "[1, 2, 3, 4, 5, 10, 11, 12, 13, 14, 15]" note: O(m) on average, where m is the length of newElements, over many calls to append(contentsOf:) on the same array.