Ok so my script is kinda like:
mouse.KeyDown:connect(function(key)
print(""..key.." Down")
end)
mouse.KeyUp:connect(function(key)
print(""..key.." Up")
end)
when i press 1, 2 and 3. It doesn't print when Key down but it does print when Key up. Anyone know why does this happen? Please respond soon, thanks!

1 comment
In addition, with key down there will be keys ROBLOX used to utilize like i, o, and number keys. Though now, it does not appear the keys will be allowed in Keydown. Thus why they have deprecated it and released UIS.