Re: Bash Shell Parameter Expansion

[Lawrence Velázquez]

On Sat, Oct 9, 2021, at 6:58 PM, tolugboji wrote:
> Some bash implementations

There is only one bash implementation.  Presumably you're referring
to Bourne-derived shell languages in general.

> mention ${PARAMETER-WORD} and ${PARAMETER+WORD}.  But these are
> not mentioned in the gnu bash manual?

As Greg already pointed out, they are in fact mentioned in the
manual, although it's admittedly easy to overlook.

> Is this because they are not implemented in gnu bash?

GNU bash is the only bash.

-- 
vq