Seeding Question

[WarningU2]

With 1.12 there is talk of seeding in the readme . I'm not sure what this means - can someone explain ?

From readme.txt with patch:
---------------- Features --------------------
* Implemented ability to enter a seed value on
the world setup screen. It is located in the
upper-right corner. Any character can be entered
as the seed. If the seed is 0 (the default), it
will generate the world normally. If every
character is a number, the value is interpreted
as the seed value and used to generate the
world. In all other cases, a hash table formula
is applied to the string to generate a unique
value that is used to generate the world. While
it is technically possible for two different
strings to evaluate to the same seed, it is
unlikely (i.e., SEED is not the same as DEES --
upper- and lower-case letters will yield
different results as welltest

[ChrTh]

What this means is:

the random seed number for a world is constant. if multiple players want to play the same game in terms of the map, they would enter the same 'seed' number, and thus have the same map. It's also useful in case you played a game and wanted to try it again.

[WarningU2]

ah thank you