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Full Discussion: Awk product of nth field
Top Forums Shell Programming and Scripting Awk product of nth field Post 302700005 by agama on Wednesday 12th of September 2012 07:51:50 PM
Old 09-12-2012
This should work for most awk versions:

Code:
awk '{ p *= $1 } END{ print p }' p=1 input-file


For gnu awk, and other recent versions, an alternative:

Code:
awk -v p=1 '{ p *= $1 } END{ print p }'  input-file

---------- Post updated at 19:51 ---------- Previous update was at 19:51 ----------

Of course you can use printf() as you did in your example instead of print.
This User Gave Thanks to agama For This Post:
madhavb
 

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LEARN ABOUT REDHAT

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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