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Full Discussion: awk If expression - Return string if not true
Top Forums UNIX for Dummies Questions & Answers awk If expression - Return string if not true Post 302952445 by Don Cragun on Wednesday 19th of August 2015 06:03:54 AM
Old 08-19-2015
You are telling awk to either print the line that contains duplicates or print the string No Duplicates for each input line you read from the file. Try this instead:
Code:
awk '
BEGIN {	FS = OFS = ","
}
$2 == $3 {
	print
	f++
}
END {	if(f == 0) print "No Duplicates"
}' List_No_Duplicates.txt

If someone wants to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.
 

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LEARN ABOUT LINUX

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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