Re: math operations with base#prefix

[Chet Ramey]

On 9/19/23 3:40 AM, Victor Pasko wrote:
> Thanks for your response.
> In my opinion, in let "<>" and $((<>)) constructs all variables should be 
> evaluated, so that $-sign for them is to be  just optional

They are, in places where identifiers are valid. In fact, variable values
are treated as expressions and evaluated recursively:

"Within an expression, shell
 variables  may  also  be referenced by name without using the parameter
 expansion syntax.  A shell variable that is null or unset evaluates  to
 0 when referenced by name without using the parameter expansion syntax.
 The value of a variable is evaluated as an arithmetic  expression  when
 it  is  referenced"

Integer constants are not one of the places where identifiers are valid.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/