Why does this coroutine in the function not stop when I use return in the function?

So I am making a script, and I was testing if something I needed in my script works. So here is what I did to test.

function f()
	local c = coroutine.wrap(function()
		while wait(1) do
			print('yay')
		end
	end)
	
	c()
	
	wait(5)
	return
end

f()

It prints "yay" more then 10 times. What would I do to yield a coroutine outside of the coroutine, and why does using return on the function the coroutine is on not stop the coroutine?

local c = coroutine.wrap(function()
 	while wait(1) do
       print('yay')
		break
    end
end)
local function f()
	wait()	
	return c()
end
f()

Hopefully, this is an answer that should work (I'm not the best with coroutines.)

The reason you can make it stop is to make it a for anystringhere = 1,40 do -- code here end

like this for example

stop = true
function f()
    local c = coroutine.wrap(function()
if stop == true then
        for n = 1,40 do
 wait()
            print('yay')
        end
stop = false
end
    end)

    c()

    wait(5)
    return
end

f()