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Line Numbers
A LINE NUMBER refers to a line in the edit buffer. The
lines are always numbered sequentially starting with 1. A
line number can be expressed as an integer, as "." meaning
the CURRENT LINE, "^" or "-" meaning the line before the
current line, "$" meaning the last line, as a PATTERN
enclosed in "/" slashes for a forward scan, as a pattern
enclosed in "?" question marks for a backward scan, as a
MARK NAME preceeded by "<" for a backward search or by ">"
for a forward search, or as any additive combination of the
above by joining them with operators "+", "-", or nothing
(meaning "+").
Type "hlist" for line number list syntax.
For details on scans and searches, type "hscan".