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Full Discussion: Sum product of even/odd lines
Top Forums Shell Programming and Scripting Sum product of even/odd lines Post 302892315 by SriniShoo on Wednesday 12th of March 2014 07:40:14 AM
Old 03-12-2014
If you are so sure about what you said, below is the code
Code:
awk '{out = 0; for(i = 2; i <= NF; i++) {if(i % 2 == 0) {p = $i} else {out = out + (p * $i)}}; print out}' file

This User Gave Thanks to SriniShoo For This Post:
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LEARN ABOUT PHP

array_product

ARRAY_PRODUCT(3)							 1							  ARRAY_PRODUCT(3)

array_product - Calculate the product of values in an array

SYNOPSIS

       number array_product (array  $array)

DESCRIPTION

       array_product(3) returns the product of values in an array.

PARAMETERS

	      o $array
		- The array.

RETURN VALUES

	Returns the product as an integer or float.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.6	|						    |
       |	|						    |
       |	|  The	product  of  an  empty array is now 1, when |
       |	| before this function would return 0 for an  empty |
       |	| array.					    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      array_product(3) examples

	      <?php

	      $a = array(2, 4, 6, 8);
	      echo "product(a) = " . array_product($a) . "
";
	      echo "product(array()) = " . array_product(array()) . "
";

	      ?>

	      The above example will output:

	      product(a) = 384
	      product(array()) = 1

PHP Documentation Group 													  ARRAY_PRODUCT(3)
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