Question

How to write a recursive function that calculates power in Swift

Answer 1

import Foundation

class RecursiveFunctionThatCalculatePower_Swift {
    static func main() {
        print(power(2, 3)) // 8
        print(power(2, 4)) // 16
        print(power(3, 2)) // 9
        print(power(3, 3)) // 27
        print(power(5, 4)) // 625
    }
     
    static func power(_ x: Int, _ y: Int) -> Int {
        if y == 0 {
            return 1
        }
         
        return x * power(x, y - 1)
    }
}

RecursiveFunctionThatCalculatePower_Swift.main()


 
 
/*
run:
 
8
16
9
27
625
 
*/

 

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