---
title: "allSatisfy(_:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/int64/words-swift.struct/allsatisfy(_:)"
---

# allSatisfy(_:)

Returns a Boolean value indicating whether every element of a sequence satisfies a given predicate.

## Declaration

```swift
func allSatisfy(_ predicate: (Self.Element) throws -> Bool) rethrows -> Bool
```

## Parameters

- `predicate`: A closure that takes an element of the sequence as its argument and returns a Boolean value that indicates whether the passed element satisfies a condition.

## Return Value

Return Value true if the sequence contains only elements that satisfy predicate; otherwise, false.

## Discussion

Discussion The following code uses this method to test whether all the names in an array have at least five characters: let names = ["Sofia", "Camilla", "Martina", "Mateo", "Nicolás"] let allHaveAtLeastFive = names.allSatisfy({ $0.count >= 5 }) // allHaveAtLeastFive == true If the sequence is empty, this method returns true. note: O(n), where n is the length of the sequence.