---
title: "init(_:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/anyiterator/init(_:)-5l6js"
---

# init(_:)

Creates an iterator that wraps the given closure in its next() method.

## Declaration

```swift
init(_ body: @escaping () -> Element?)
```

## Parameters

- `body`: A closure that returns an optional element. body is executed each time the next() method is called on the resulting iterator.

## Discussion

Discussion The following example creates an iterator that counts up from the initial value of an integer x to 15: var x = 7 let iterator: AnyIterator<Int> = AnyIterator {     defer { x += 1 }     return x < 15 ? x : nil } let a = Array(iterator) // a == [7, 8, 9, 10, 11, 12, 13, 14]