print("Hello World")

--this is a comment print("hello") --this is another comment -- the next line will not do anything because it is commented out --print("world") 

-- Different types local x = 10 --number local name = "john doe" --string local isAlive = false -- boolean local a = nil --no value or invalid value

-- examples local a = 1 local b = 2 local c = a + b print(c) -- 3 local d = b - a print(d) -- 1 local x = 1 * 3 * 4 -- 12 print(x) local y = (1+3) * 2 -- 8 print(y) print(10/2) -- 5 print (2^2) -- 4 print(5%2) -- 1 print(-b) -- -2

-- increment local level = 1 level = level + 1 print(level) -- 2

-- concatenate strings local phrase = "My name is " local name = "John Doe" print(phase .. name) --My name is John Doe -- strings and numbers local age = 12 local name = "Billy" print(name .. " is " .. age .. " years old")

local isAlive = true print(isAlive) --true isAlive = false print(isAlive) --false

--number comparisions local age = 10 if age < 18 then print("over 18") --this will not be executed end --elseif and else age = 20 if age > 18 then print("dog") elseif age == 18 then print("cat") else print("mouse") end

--boolean comparision local isAlive = true if isAlive then print("dog") end --string comparisions local name = "billy" if name == "Billy" then --false print("Billy") elseif name == "billy" then --true print("billy") end 

local x = 10 if x == 10 and x < 0 then --both are true print("dog") elseif x == 100 or x < 0 then --1 or more are true print("cat") end --result: cat

local x = 10 local isAlive = true if x==10 then if isAlive == true then print("dog") else print("cat") end end

local x = 10 if not x == 10 then print("here") end

function printTax(price) local tax = price * 0.21 print("tax:" .. tax) end printTax(200)

--function that returns a value function calculateTax(price) return price * 0.21 end local result = calculateTax(100) print(result) --reusing the function but this time using variables local bread = 130 local milk = 110 local breadTax = calculateTax(bread) --27.3 local milkTax = calculateTax(milk) --23.1 print("Bread Tax = " .. breadTax) print("Milk Tax = " .. milkTax) 

--multiple parameters function displayInfo(name, age, country) print(name .. " is " .. age .. " years old and is from " .. country) end displayInfo("Billy", 12, "Jupiter")

function foo() local a = 10 end print(a) --nil

local isAlive = true if isAlive then local a = 10 end print(a) --nil

local _G.myValue = 69 --doing this can sometimes be bad practice

--while loop local i = 0 local count = 0 while i <= 10 do count = count + 1 end print("count is " .. count) --count is 7 --for loop count = 0 for i=1, 5 do count = count + 1 end print("count is " .. count) 

--infinite loop will never end local i = 0 while i >= 0 do i = i + 1 print(i) end

local count = 0 for a=1, 10 do for b=1, 10 do count = count + 1 end end print(count) -- 100

--basic table local colors = { "red", "green", "blue" } print(colors[1]) --red print(colors[2]) --green print(colors[3]) --blue --using a loop to iterate though your table for i=1, #colors do print(colors[i]) end

--insert local colors = { "red", "green", "blue" } table.insert(colors, "orange") local index = #colors --4 (this is the last index in the table) print(colors[index]) --orange

--insert at index local colors = { "red", "green", "blue" } table.insert(colors, 2, "pink") for i=1, #colors do print(colors[i]) end --red, pink, green, blue

--remove  local colors = { "red", "green", "blue" } table.remove(colors, 1) for i=1, #colors do print(colors[i]) end -- "green", "blue"

--tables within tables local data = { { "billy", 12 }, { "john", 20 }, { "andy", 65 } } for a=1, #data do print(data[a][1] .. " is " .. data[a][2] .. " years old") end

local teams = { ["teamA"] = 12, ["teamB"] = 15 } print(teams["teamA"]) -- 12 for key,value in pairs(teams) do print(key .. ":" .. value) end

--insert into key table teams["teamC"] = 1

--remove key from table teams["teamA"] = nil

function getTeamScores() local scores = { ["teamA"] = 12, ["teamB"] = 15 } return scores end local scores = getTeamScores() local total = 0 for key, val in pairs(scores) do total += val end print("Total score of all teams:" .. total)

require("otherfile")