Simple question about referencing instances with whitespace

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#1

So I’m just trying to call something with a space in it like this -
local Larm = player.Character.Left Arm

But obviously it won’t work because of the space in “Left Arm” and I forgot how your suppose to put it so you can include spaces.

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#2 
local Larm = player.Character:WaitForChild("Left Arm")
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#3 
local Larm = player.Character["Left Arm"]
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#4 
local Larm = player.Character["Left Arm"] --Same as the one below.
local Larm = player.Character:FindFirstChild("Left Arm") --Finds the child called "Left Arm".
local Larm = player.Character:WaitForChild("Left Arm") --If the arm has not spawned, perhaps you are using a custom arm; then this would help.

Just like the users above mentioned.

#5 
local LeftArm= player.Character:WaitForChild("Left Arm",math.huge)

I think this sequence of code will repeat searching until it finds the part.

#6

Doesn’t :WaitForChild() infinitely yield by default? Seems like adding math.huge is redundant.

#7

Oh, right. The math.huge just gets rid of the warning message, but other than that, there’s no point in using it.