arr1 = [1, 2, 3, 4, 5]
println arr1[0]
println arr1[1]
println arr1

use "std"
arr2 = newarray(5)
arr2[2] = 9
arr2 = arr2 :: 4
println arr2

// Append array
arr3 = arr1 :: arr2
println arr3
// Merge array
arr4 = arr1 << arr2
println arr4


// Array 2d
arr5 = newarray(4, 4)
println arr5
arr5[1] = arr1
println arr5

arr6 = [arr5[1], arr5[2]]
println arr6