matrix-diagonal-sum

submission.go

func diagonalSum(mat [][]int) int {
    result := 0
    for i := 0; i < len(mat); i++ {
        for j := 0; j < len(mat);  j++ {
            if i==j || j == len(mat) -i-1 {
             result+=mat[i][j]
         }
        }
    }
    
    return result
}