LÖVE

How do I input the "Control" key in Love (e.g. love.keyboard.isDown("ctrl")?

I've tested with "ctrl" but it is not that, and I've Google and searched in these forums, but can not find it.

I'm trying to use it as such in the code below:

if love.keyboard.isDown("f") and love.keyboard.isDown("ctrl") then
player.x = player.x + 1
end

Thank you.

https://love2d.org/wiki/KeyConstant

at bottom:

rctrl Right control key
lctrl Left control key