Instance MethodSwift

# first(where:)

Returns the first element of the sequence that satisfies the given predicate.

`func first(where predicate: (Self.Element) throws -> Bool) rethrows -> Self.Element?`

## Parameters

- predicate
A closure that takes an element of the sequence as its argument and returns a Boolean value indicating whether the element is a match.

## Returns

The first element of the sequence that satisfies `predicate`

, or `nil`

if there is no element that satisfies `predicate`

.

## Overview

The following example uses the `first(where:)`

method to find the first negative number in an array of integers:

```
let numbers = [3, 7, 4, -2, 9, -6, 10, 1]
if let firstNegative = numbers.first(where: { $0 < 0 }) {
print("The first negative number is \(firstNegative).")
}
// Prints "The first negative number is -2."
```