print(math.abs(-15))

print('hello world!')

print('hello', 'world')

print('hello' .. 'world')

local a = 4
local b = 3.12
local c = 'hello'
local d = [[abcdefg]]

print(a, b, c, d)
local one, two, three = 'one', 2, false

print(one, two, three)

GlobalVar = 23
print(_G['GlobalVar'])

local name = 'Qinga'
print('Hello, my name is ' .. name)
name = 'Sad'
print('this is a cool name, ' .. name)

a = 'ddddddd'
b = 'ccccccc'
c = [[
 abdsde
    adfadfd
        fgfgfgfg
]]
        print(a)
        print(b)
        print(c)

local x = 'adfdfdfdf'
print(#x)
local num = 22
local str = tostring(num)
print(type(num), type(str))

print('what is your name')
--local ans = io.read()
--print('Name:', ans)
local tbl = {'this', 2, 93, true, {'ok', 'cool'}}
for i = 1, #tbl do
    print(tbl[i])
end

--io.output('myfile.txt')
--io.input('myfile.txt')
--local fileData = io.read('*all')
--print(fileData)
--io.close()

--local file = io.open('myfile.txt', 'w')

--if file ~= nil then
--    file:write('aaaaaaaa, bit')
--    file:close()
--else
--    print('can not open the file')
--end

--local file = io.open('myfile.txt', 'r')
----if file ~= nil then 
--    print(file:read('*all'))
--    file:close()
--else
--    print('can not open')
--end
local file = io.open('myfile.txt', 'a')
if file ~= nil then 
    print(file:write('\nAppended text'))
    file:close()
else
    print('can not ')
end



local mod = require('custom')

print(mod.sum(10, 4))
mod.sayHello('junge')