Bash and declare

[Christopher Browne]

On 3/29/06, Neil Watson <tlug-neil-8agRmHhQ+n2CxnSzwYWP7Q at public.gmane.org> wrote:
> I bought Ken's book on Bash scripting.  In it he talks about using
> 'declare' to initialize variables.  In Perl 'my' is used like declare
> but, more specifically for variable scope.  What is the purpose of
> declare?

It is used to indicate variable attributes.

declare -a arr
  indicates that arr is an array

declare -i ival
  indicates that ival stores integers, as opposed to strings/floats

declare -r rval
  indicates that rval is now read-only

There are several other declaration options; see the man page :-).
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