Arrays

An array is a contiguous chunk of memory; some programming languages guarantee that the memory will be contiguous. In Lua, an array might use a linear chunk of memory if the following apply:

• The table has only numeric indices
• The numeric indices start from one
• At least half of the indices are not nil

For now, assume that an array is defined as a table that is indexed only numerically, starting with index 1. By this definition, the following code demonstrates how to use a table as an array:

arr = {}

arr[1] = "x"
arr[2] = "y"
arr[3] = "z"

for i = 1,3 do
    print(arr[i])
end