Doubt about expr

[Sebastian Kreft]

I don't know if it is a standard of expr, but I think that is not intuitive
to write a plus symbol before the string substr if I want to get the length
of it.
I know that is in the help, but I think that this shouldn't be necessary.

I haven't seen the source code of the parsing so much, because I don't know
if this behaviour is a standard or not.

$ expr length substr
expr: syntax error
$ expr length + substr
6


Sebastián Kreft C.