Hash function doesn't work

[evansste]

I ran across the following link, which makes it seem as if Octave has a hash
function:

https://octave.sourceforge.io/octave/function/hash.html

However, when I try to use the hash function, Octave doesn't seem to know
what I'm talking about.  For instance, if I type the following, at an Octave
prompt:

hash ("md5", "abc")

Octave returns:

error: 'hash' undefined near line 1 column 1

As you can see, I'm using the exact example which is shown in the link.  So
why does Octave return an error message?
At the bottom of the link, it says that this is an Octave package.  Doesn't
that mean that it's already installed in Octave?  If not, then how would I
install it?

Thanks for your time, and I appreciate any help that anyone is willing to
provide.



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