How to map Shift+- (Shift+dash) in vim?

Question

I am struggling with binding Shift+- combination in vim. I have tried both options below to no available and googling does not bring any relevant information.

nnoremap <S-\-> <C-W>-
nnoremap <S--> <C-W>-

I am running Linux and want to bind - key which is between 0 and = keys.

Answer 1

Just use the character on the key.

nnoremap _ <C-W>-