> I would kindly bring to your notice an error in the functionality of the shell
>program 'expr'. The program malfunctions whenever we try to evaluate an expression
>containing the symbols '<' or '>'. After hours of debugging, I noticed that the Unix
>shell by default uses these symbols for redirection, so the command never gets to see
>these symbols. So, inspite of the mention of the symbols in the manual documenation
>and the in-file documentation, i.e. using the 'expr --help' command, the
>functionality of those is not realised.
Sorry you had such difficulty using expr. The command is one of the
oldest of the unix command set and has a syntax required by legacy
programs.
The man page for expr shows:
Beware that many operators need to be escaped or quoted
for shells.
Try this:
expr 2 '<' 3
Bob
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