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#print You can also use relative addresses of the +1 or -1 sort with context searches. For example, to print the line after a line containing "cat", you can say /cat/+1p How would you print the lin

#print So far all the addresses you have used have been either line numbers, '$', or '.' (or combinations thereof). The most useful addresses are none of those, but are specifications of lines by con

#print A range of line numbers can be used with the substitute command as with the print command. For example, $-4,$s/cat/&s/p will change "cat" into "cats" on the last five lines of a file. In th

#print Note that the // searches always go forward. Sometimes you want to go backward, to find some expression on a line before the one you are now working on. In that case you can search with a comma

#print Now that you know how to delete lines, you may eventually delete some by mistake. If you just deleted some lines, you can always recover them with the 'u' command. For example, 1,5d u wi

#print Perhaps the most powerful editor command is the 'g' (global) command. This command selects sets of lines on which other commands are executed. For example, g/abc/p prints all lines on which

#print This is an easy unit. If you just hit "newline" (or "carriage return", whatever it is labeled on your terminal), the editor will simply print the next line as you can see by trying this out.

#print Each 'w' command typed so far has written the edited material back on the same file that it came from originally. This can be changed by giving a filename on the 'w' command: w camden will wr

#print (Section 1.5) Write a program that copies exactly three characters from its input to its output. When compiled and tested, type ready. #once #create Ref XY #once #create z1 XY marks the spot. #

#print Write a program which prints the number of vowels (instances of 'a', 'e', 'i', 'o', and 'u') in the input. #once #create Ref hoboken harrison newark roseville avenue grove street east orange br