A method that defines a two dimensional array and an example of a traversal method in Swift

// Define the way 1
var array1 = [[Int]]()

// Define the way 2
var array2 = Array<Array<Int>>()

array1 = [
  [13,1,4],
  [5,1,7,6]
]

array2 = array1

//　1 The definition of a dimensional array 
var v = [Int]()
v = [4,5,7,8]
array2.append(v)


println(array1)
println(array2)

// Traversal of an array 
for var i=0; i<array1.count; i++ {
  for var j=0; j<array1[i].count; j++ {
    println(array1[i][j])
  }
}