import std/strformat

proc main() =
  # Here we create an array `a` that will hold exactly
  # 5 integers. The type of elements and length are both
  # part of the array's type. By default, an array is
  # zero-initialized, which for integers means 0s.
  var a: array[5, int]
  echo fmt"emp: {a}"

  # We can set a value at an index using the
  # array[index] = value syntax, and get a value with
  # array[index].
  a[4] = 100
  echo fmt"set: {a}"
  echo fmt"get: {a[4]}"

  # The len() procedure returns the length of an array.
  echo fmt"len: {len(a)}"

  # Use this syntax to declare and initialize an array
  # in one line.
  var b = [1, 2, 3, 4, 5]
  echo fmt"dcl: {b}"

  # In Nim, you can use array[0..4, int] to specify
  # the range of indices.
  var c: array[0..4, int] = [1, 2, 3, 4, 5]
  echo fmt"range: {c}"

  # You can also use array comprehension to initialize arrays
  var d = [i * 10 for i in 0..4]
  echo fmt"comp: {d}"

  # Array types are one-dimensional, but you can
  # compose types to build multi-dimensional data
  # structures.
  var twoD: array[2, array[3, int]]
  for i in 0..1:
    for j in 0..2:
      twoD[i][j] = i + j
  echo fmt"2d: {twoD}"

  # You can create and initialize multi-dimensional
  # arrays at once too.
  twoD = [
    [1, 2, 3],
    [4, 5, 6]
  ]
  echo fmt"2d: {twoD}"

main()