[unix-history] / usr / lib / learn / editor / L14.2a

#print
You can also use the "=" command to find out what
the 'current' line is.  Since the current line
is named '.', the appropriate command is
   .=
and so if you say
   3p
   .=
the second command will print '3'.  Since you should not
believe what I tell you without checking it, edit file
"doubt" and type the two commands above, which first
print line 3 (and incidentally set "." to that line) and
then ask what number "." is.  Then type w, q, ready.
#create doubt
you didn't have to print this line
you didn't have to print this line
to err is human, to really foul things up takes a computer
you didn't have to print this line
you didn't have to print this line
#copyout
#user
#uncopyout
grep 3 .ocopy >dev/null
#log
#next
14.2b 5
Commit	Line	Data
fed84c9b TL	1	#print
	2	You can also use the "=" command to find out what
	3	the 'current' line is. Since the current line
	4	is named '.', the appropriate command is
	5	.=
	6	and so if you say
	7	3p
	8	.=
	9	the second command will print '3'. Since you should not
	10	believe what I tell you without checking it, edit file
	11	"doubt" and type the two commands above, which first
	12	print line 3 (and incidentally set "." to that line) and
	13	then ask what number "." is. Then type w, q, ready.
	14	#create doubt
	15	you didn't have to print this line
	16	you didn't have to print this line
	17	to err is human, to really foul things up takes a computer
	18	you didn't have to print this line
	19	you didn't have to print this line
	20	#copyout
	21	#user
	22	#uncopyout
	23	grep 3 .ocopy >dev/null
	24	#log
	25	#next
	26	14.2b 5