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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..<size{
for y in 0..<size{
if (x+y) == size - 1{
sum += mxt[x][y]
}
}
}
return sum
}
}
let matrix = [[3, 5, 9, 1], [3, 5, 7, 3], [3, 2, 6, 1], [4, 5, 2, 6]]
//MARK: - Print Matrix Format 4X4
for x in 0..<4{
for y in 0..<4{
print(matrix[x][y], terminator: " ")
}
print()
}
//MARK: - Output === >
/*
3 5 9 1
3 5 7 3
3 2 6 1
4 5 2 6
*/
//MARK: - Class object
let objSumDiagonal = SumDiagonal()
//MARK: - Now Sum of Left Diagonal
print("Sum of Left Diagonal == >> \(objSumDiagonal.sumOfLeftDiagonal(mxt: matrix, size: 4))")
//MARK: - Output === >
//Sum of Left Diagonal == >> 20
//MARK: - Now Sum of Right Diagonal
print("Sum of Right Diagonal == >> \(objSumDiagonal.sumOfRightDiagonal(mxt: matrix, size: 4))")
//MARK: - Output === >
//Sum of Right Diagonal == >> 14
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