---
title: "contains(_:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/range/contains(_:)-4xxju"
---

# contains(_:)

Returns a Boolean value indicating whether the given range is contained within this range.

## Declaration

```swift
func contains(_ other: Range<Bound>) -> Bool
```

## Parameters

- `other`: A range to check for containment within this range.

## Return Value

Return Value true if other is empty or wholly contained within this range; otherwise, false.

## Discussion

Discussion The given range is contained within this range if its bounds are equal to or within the bounds of this range. let range = 0..<10 range.contains(2..<5)        // true range.contains(2..<10)       // true range.contains(2..<12)       // false Additionally, passing any empty range as other results in the value true, even if the empty range’s bounds are outside the bounds of this range. let emptyRange = 3..<3 emptyRange.contains(3..<3)   // true emptyRange.contains(5..<5)   // true note: O(1)