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Annotation of 42BSD/usr.lib/learn/editor/L13.1a, revision 1.1

1.1     ! root        1: #print
        !             2: Remember we said that you didn't have to know the
        !             3: number of the last line, because '$' could
        !             4: always be used for that.  What if you want to know
        !             5: how long the file is?  Well, the editor command
        !             6:   $=
        !             7: will tell you what '$' is set to, i.e. the number of
        !             8: lines in the file.  You can find the number of lines in
        !             9: any file, then, by editing it and then typing "$=".
        !            10: (You then must leave the editor with the usual wq).
        !            11: How many lines are there in file 'henry'?  You may want to check
        !            12: by listing the file with "cat" as well as by using "$="
        !            13: in the editor.  Don't forget to leave the editor with
        !            14: the usual 'wq'; eventually, type "answer N"
        !            15: where N is the number of lines.
        !            16: #create henry
        !            17: Murray Hill
        !            18: Holmdel
        !            19: Whippany
        !            20: Madison
        !            21: Piscataway
        !            22: Chester
        !            23: Warren
        !            24: #copyin
        !            25: #user
        !            26: #uncopyin
        !            27: #match 7
        !            28: #succeed
        !            29: Of course the editor announced this fact when you first entered it.
        !            30: "$=" is most useful when the number of lines changes during a session.
        !            31: #log
        !            32: #next
        !            33: 13.3a  10

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