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Piping the output of awk through cat -v also showed what awk was printing: William,Robert,*2547123456^M* Mary,Jane,*2547123456^M* John,Michael,*2547123456^M* So this had nothing to do with Awk at all! This explains why formatting the phone numbers as integers doesn't produce garbled output: the \r isn't printed.
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The default is a newline character. print automatically outputs the contents of ORS at the end of whatever it is given to print. In the above example, the awk command with NR prints all the lines along with the line number.
AWK has a built-in variable known as NR. It counts the number of input lines read so far. We can use NR to prefix $0 in the print statement to display the line numbers of each line that has been processed: 13. AWK sum column by counting the numbers of lines in a file using NR
The following `awk` command will print the first, second, and third columns of marks.txt by setting enough space for 10 characters. The following output will be produced by running the above commands. There are various ways to print the range of columns from the command output or a file.
When AWK programs are long, it is more convenient to put them in a separate file. Putting AWK programs in a file reduces errors and retyping. The -f option tells the AWK utility to read the AWK commands from source_file. Any filename can be used in place of source_file.