Iterate with index in Lua

In Lua, you can iterate over an array with index using a for loop. Here's an example:

local arr = {10, 20, 30, 40}
for i = 1, #arr do

  print("Index: " .. i .. " Value: " .. arr[i])

end

In this example, the for loop starts at index 1 and iterates up to the length of the array using the #arr operator. Within the loop, we print out each index and corresponding value using the arr[i] syntax.

This will output:

Index: 1 Value: 10
Index: 2 Value: 20
Index: 3 Value: 30
Index: 4 Value: 40

You can modify the loop to only iterate over a portion of the array by adjusting the loop bounds. For example, if you want to iterate over the first three elements of the array, you can set the loop to for i = 1, 3 do.