Coin Door

Part of the Roblox Game Scripting section of Coddy's Lua journey. Lesson 16 of 24.

An if can do more than check for nil. It can compare numbers, and an else part runs when the comparison is false:

local score = player.leaderstats.Score.Value
if score >= 10 then
	print("You win!")
else
	print("Keep going")
end

The comparison operators are == (equal), ~= (not equal), <, >, <= and >=. Note the double ==: a single = puts a value in a variable, it does not compare.

>= 3 means "3 or more"; > 3 means "more than 3", so exactly 3 would not pass.

Challenge

Medium

Three coins float on the right, and a wooden door blocks the wall. The world counts the coins for you. This script is in the door, and its Touched function runs when a player steps on the blue pad in front of it.

If the player has 3 or more Coins, open the door: CanCollide false and Transparency 0.5.
Otherwise, print exactly You need 3 coins.

Press Play, try the pad first, collect the coins and try again. Then Check.

Try it yourself

local Players = game:GetService("Players")
local door = script.Parent
local pad = workspace.DoorPad

pad.Touched:Connect(function(hit)
	local player = Players:GetPlayerFromCharacter(hit.Parent)
	if player then
		local coins = player.leaderstats.Coins.Value
		-- 3 coins or more: open the door
		-- otherwise: print "You need 3 coins"
	end
end)

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Roblox Game Scripting

1Scripts and Parts

Hello, Roblox Paint a Part Stretch the Bridge Build a Platform

4Game Mechanics

Speed Pad Jump Pad Click Me The Button Door Moving Platform Checkpoints Finish Line

2Loops and Functions

Row of Pillars Staircase Builder Tower Builder Coin Factory Blinking Light Vanishing Bridge

5Your First Game

Your First Obby

3Events and Players

Touch Pad Lava Floor Leaderstats Who Touched It?Coin CollectorCoin Door

Practice on your own: Online Lua compiler