Optional(Range(0..<1)) Optional(Range(0..<1)) nilstderr:

<stdin>:8:14: warning: string interpolation produces a debug description for an optional value; did you mean to make this explicit? print("\(range)") ^~~~~ <stdin>:8:14: note: use 'String(describing:)' to silence this warning print("\(range)") ^~~~~ String(describing: ) <stdin>:8:14: note: provide a default value to avoid this warning print("\(range)") ^~~~~ ?? <#default value#>