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Sum of left & Right diagonal of the matrix In Swift import Foundation class SumDiagonal { // Left Sum Diagonal func sumOfLeftDiagonal ( mxt : [[ Int ]], size : Int ) -> Int { var sum = 0 for x in 0 ..<size{ for y in 0 ..<size{ if x == y{ sum += mxt[x][y] } } } return sum } // MARK: - Right Sum Diagonal func sumOfRightDiagonal ( mxt : [[ Int ]], size : Int ) -> Int { var sum = 0 for x in 0 ..<siz...