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

Joe Zeff joe at
Sat Jul 2 17:50:46 UTC 2011

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.

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