[unix-history] / usr / lib / learn / editor / L6.1a

#print
You may well ask how the editor knows which line to print.
The editor keeps track of the 'current line', which
is usually the last line you touched in any way.
When you begin editing a file, for example, the
current line is the last line.
If you want to print any particular line, however,
that is easy.  For example, to print the 3rd line you say

3p

To print the first line

1p

(That's a one, no matter how much it looks like the letter "l".)
Here is a file: I'll put you into the editor
with that file as the 'current file' - print the 4th line,
then type 'w', 'q', and 'ready' as usual.
#create Ref
james madison
91
#create file
george washington
john adams
thomas jefferson
james madison
james monroe
john quincy adams
#print file
#copyout
#pipe
ed file
#user
#unpipe
#uncopyout
tail -2 .ocopy >X2
#cmp Ref X2
#log
#next
7.1a 10
Commit	Line	Data
00b28f22 TL	1	#print
	2	You may well ask how the editor knows which line to print.
	3	The editor keeps track of the 'current line', which
	4	is usually the last line you touched in any way.
	5	When you begin editing a file, for example, the
	6	current line is the last line.
	7	If you want to print any particular line, however,
	8	that is easy. For example, to print the 3rd line you say
	9
	10	3p
	11
	12	To print the first line
	13
	14	1p
	15
	16	(That's a one, no matter how much it looks like the letter "l".)
	17	Here is a file: I'll put you into the editor
	18	with that file as the 'current file' - print the 4th line,
	19	then type 'w', 'q', and 'ready' as usual.
	20	#create Ref
	21	james madison
	22	91
	23	#create file
	24	george washington
	25	john adams
	26	thomas jefferson
	27	james madison
	28	james monroe
	29	john quincy adams
	30	#print file
	31	#copyout
	32	#pipe
	33	ed file
	34	#user
	35	#unpipe
	36	#uncopyout
	37	tail -2 .ocopy >X2
	38	#cmp Ref X2
	39	#log
	40	#next
	41	7.1a 10