Lua Academy · Lesson

Adding and Removing Items

Use table.insert and remove.

Growing a Sequence

Real lists change size while a program runs. Lua gives you table.insert to append items at the end.

Because sequences are 1-based, an append after two items lands at index 3.

local list = {"a", "b"}
table.insert(list, "c")
print(list[1], list[2], list[3])

Called with two arguments, table.insert(t, value) places value at the position right after the current last index.

Each call grows the sequence by one, keeping the indices contiguous.

local q = {}
table.insert(q, "first")
table.insert(q, "second")
print(q[1], q[2])