--- Functions ---

print("----連加----")
function test(s, e)
    local a = 0
    for i = s, e do
        a = a+i
    end
    print(a)
end
test(1,10)


print("----Simple example----")
function Tax(price)
  local tax = price * 0.21
  print("Tax:" .. tax)
end
Tax(500)

print("----function that returns a value----")
function calculateTax(price)
  return price * 0.21
end

local result = calculateTax(560)
print("Tax:" .. result)


print("----reusing the function but 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) 



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