Loops and iteration

Syntax

for index = 1, 3 do
    print(index)
end

Examples

local values = {4, -2, 7, 0}
local total = 0
for _, value in ipairs(values) do
    if value <= 0 then
        continue
    end
    total += value
end
print(total) -- 11

local values = {1, 2, 3, 4}
for index = #values, 1, -1 do
    if values[index] % 2 == 0 then
        table.remove(values, index)
    end
end
print(table.concat(values, ", ")) -- 1, 3

Best practices

• Do not assume pairs produces sorted keys.
• Use a bounded loop for a finite task, and disconnect event-driven work when its owner disappears.
• For continuous Roblox work, choose an appropriate RunService event or task delay rather than while true without yielding.

At a glance

Purpose

Typed scripting and Roblox development

File extension

.luau

Runs in

Luau host; Roblox engine examples require Roblox Studio

Usually used with

Roblox APIs and Studio

Specifications & further reading

• Roblox Creator Hub
• Roblox Creator Hub

Related Luau documentation