Lua Coroutines and Error Handling

local co = coroutine.create(function()
    print("Step 1")
    coroutine.yield()  -- pause
    print("Step 2")
    coroutine.yield()  -- pause
    print("Step 3")
end)

coroutine.resume(co)  -- "Step 1"
coroutine.resume(co)  -- "Step 2"
coroutine.resume(co)  -- "Step 3"

local co = coroutine.create(function()
    local name = coroutine.yield("What is your name?")
    local age = coroutine.yield("How old are you?")
    return "Hello " .. name .. ", age " .. age
end

local _, question = coroutine.resume(co)
print(question)  -- "What is your name?"

local _, question2 = coroutine.resume(co, "Sita")
print(question2)  -- "How old are you?"

local _, result = coroutine.resume(co, 21)
print(result)  -- "Hello Sita, age 21"

-- pcall protects against errors
local ok, result = pcall(function()
    error("Something went wrong")
end)

if ok then
    print("Success:", result)
else
    print("Error:", result)
end

local function divide(a, b)
    assert(b ~= 0, "Cannot divide by zero")
    return a / b
end