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#print
Remember that "$" is the last line in
the current file. Suppose you want to
know how long the file is, i.e. what the
number of the last line is. The command
$=
will tell you that. So you can find the
length of the file "data" by saying
ed data
$=
w
q
Try that; then check by listing the file
with "cat" to see how long it is. Then type
"ready".
#create data
This is the file
which you should
find the number
of lines in by
typing "$=" in
the editor and see
that it has exactly
nine lines in it
when printed.
#copyout
#pipe
#user
#unpipe
#uncopyout
grep 9 .ocopy >/dev/null
#log
#next
13.2b 5
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