now i have one array like = [1,2,3,4,5,6,7] and user will input the value like 3 then we first search the index of value, which entered by user...and we generate new array like = [3,4,5,6,7,1,2]

gistfile1.txt

class ViewController: UIViewController {

    var array = ["R","a","v","i","i","o","s"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        getNewArray(input: "v")
        getNewArray1(input: "v")
    }

    func getNewArray(input:String){
        var index = array.firstIndex(of: input)!
        
        var arra1 : [String] = []
        for i in index..<array.count{
            arra1.append(array[i])
        }
        for i in 0..<index{
            arra1.append(array[i])
        }
        print(arra1)
    }
    
    func getNewArray1(input:String){
        var index = array.firstIndex(of: input)!
        var arra1 : [String] = []
        var value = index
        for i in 0..<array.count{
            
            if value == array.count{
                value = 0
            }
            arra1.append(array[value])
            value += 1
        }
        print(arra1)
    }


}