This task is about arrays.

For hashes or associative arrays, please see Creating an Associative Array.

For a definition and in-depth discussion of what an array is, see Array.



Task

Show basic array syntax in your language.

Basically, create an array, assign a value to it, and retrieve an element   (if available, show both fixed-length arrays and
dynamic arrays, pushing a value into it).

Please discuss at Village Pump:   Arrays.

Please merge code in from these obsolete tasks:

   Creating an Array
   Assigning Values to an Array
   Retrieving an Element of an Array


Related tasks

   Collections
   Creating an Associative Array
   Two-dimensional array (runtime)


var arr = []
arr.add(1)
arr.add(2)
arr.count // 2
arr.clear()
 
arr.add(0)
arr.add(arr[0])
arr.add(1)
arr.add(arr[-1])  // [0, 0, 1, 1]
 
arr[-1] = 0
arr.insert(-1, 0) // [0, 0, 1, 0, 0]
arr.removeAt(2)   // [0, 0, 0, 0]