Re: ensure numeric comparison

[Andrew J. Schorr]

On Thu, May 26, 2022 at 11:58:54AM -0500, Peng Yu wrote:
> When I say "empty string", I am referring to '' in bash. The input is
> an empty string in a line. But awk, once reading the input in,
> considers it as unassigned. So you did miss this case in the
> discussion. I just wanted to point it out.

I don't understand what you're saying. To repeat: there is a difference between
a variable that has been assigned a value of an empty string (a string that
contains zero characters) vs. a variable that has never been assigned any value
at all. Such variables will behave differently.  Please give an example of the
case that you are concerned about.

Regards,
Andy