How To Remove LayerMask (Bit Operator)

Hi there,
I was recently introduced to bit operators and specifically how to add a layer mask after run time to a variable.

Code (csharp):

1.  
2. faceLayerMask = faceLayerMask | (1<<10);
3.  

but I can not for the life of me, figure out how to remove the added layer. Various attempts have failed.



Thanks

 

try

faceLayerMask ^= (1<<10);


the ^= operator returns true only if one and only one of both bits being compared is equal to 1

 

That did it.
Thanks.
!!!:()(

 

Doesn't that mean that you could accidentally add the layer to the mask if doens't contain the layer already ?
My guess for strictly removing a layer from a mask would have been:
faceLayerMask &= ~(1<<10);

(Though I'm also new to bit operators so correct me if I'm wrong, I literally just discovered the ~ operator while checking whether ! would do what I wanted).

 

It's an old post, but I believe the &= ~(1 << shift) is correct.