# random(in:using:) Returns a random value within the specified range, using the given generator as a source for randomness. ``` static func random(in range: Range, using generator: inout T) -> Self where T : RandomNumberGenerator ``` ## Parameters `range` The range in which to create a random value. `range` must not be empty. `generator` The random number generator to use when creating the new random value. ## Return Value A random value within the bounds of `range`. ## Discussion Use this method to generate an integer within a specific range when you are using a custom random number generator. This example creates three new values in the range `1..<100`. ``` for _ in 1...3 { print(Int.random(in: 1..<100, using: &myGenerator)) } // Prints "7" // Prints "44" // Prints "21" ``` > Note: The algorithm used to create random values may change in a future > version of Swift. If you’re passing a generator that results in the > same sequence of integer values each time you run your program, that > sequence may change when your program is compiled using a different > version of Swift. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)