---
title: "allocate(capacity:)"
framework: swift
role: symbol
role_heading: Type Method
path: "swift/unsafemutablebufferpointer/allocate(capacity:)"
---

# allocate(capacity:)

Allocates uninitialized memory for the specified number of instances of type Element.

## Declaration

```swift
static func allocate(capacity count: Int) -> UnsafeMutableBufferPointer<Element>
```

## Parameters

- `count`: The amount of memory to allocate, counted in instances of Element.

## Discussion

Discussion The resulting buffer references a region of memory that is bound to Element and is count * MemoryLayout<Element>.stride bytes in size. The following example allocates a buffer that can store four Int instances and then initializes that memory with the elements of a range: let buffer = UnsafeMutableBufferPointer<Int>.allocate(capacity: 4) _ = buffer.initialize(from: 1...4) print(buffer[2]) // Prints "3" When you allocate memory, always remember to deallocate once you’re finished. buffer.deallocate()