Bash: (foo==0)?foo=1:foo=0 valid?

[Joe Zeff]

On 07/02/2011 10:45 AM, Daniel B. Thurman wrote:
>
> I seem to forget my shell programming
> but is the following statement valid?
>
> ($foo==0)?foo=1:foo=0
>
> I thought it was called the tristate conditional
> operator but in any case I could not find it in
> google.
>
>

I don't know if it's allowed in bash, or any other shell.  I do know, 
however, that it's a valid construct in C.