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Full Discussion: Syntax error in subtraction in Bash
Top Forums Shell Programming and Scripting Syntax error in subtraction in Bash Post 303040005 by ngabrani on Monday 21st of October 2019 12:50:50 PM
Old 10-21-2019
Syntax error in subtraction in Bash
I am sharing a code snippet.
Code:
for (( i=0; i<=$(( $count -1 )); i++ ))
do

	first=${barr2[$i]}
	search=${barr1[$i]}
        echo $first
	echo "loop begins"
	for (( j=0; j<=5000; j++ ))
	do
		if [[ ${harr1[j]} == $search ]]; then
			echo $j
			break;
		fi

	done
	second=${harr2[$j]}	
	echo $second
	
	diff=$((second-first))
	echo "diff" 
	echo $diff
done

I am getting a syntax error in line of subtraction that says something like:
syntax error: invalid arithmetic operator (error token is ".0985146")

This is the line that gives error.
Code:
	diff=$((second-first))

Appreciate your help.
 

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LEARN ABOUT DEBIAN

text::context

Text::Context(3pm)					User Contributed Perl Documentation					Text::Context(3pm)

NAME

       Text::Context - Handle highlighting search result context snippets

SYNOPSIS

	 use Text::Context;

	 my $snippet = Text::Context->new($text, @keywords);

	 $snippet->keywords("foo", "bar"); # In case you change your mind

	 print $snippet->as_html;
	 print $snippet->as_text;

DESCRIPTION

       Given a piece of text and some search terms, produces an object which locates the search terms in the message, extracts a reasonable-length
       string containing all the search terms, and optionally dumps the string out as HTML text with the search terms highlighted in bold.

   new
       Creates a new snippet object for holding and formatting context for search terms.

   keywords
       Accessor method to get/set keywords. As the context search is done case-insensitively, the keywords will be lower-cased.

   paras
	   @paras = $self->paras($maxlen)

       Return shortened paragraphs to fit together into a snippet of at most $maxlen characters.

   as_text
       Calculates a "representative" string which contains the given search terms. If there's lots and lots of context between the terms, it's
       replaced with an ellipsis.

   as_html([ start => "<some tag>", end => "<some end tag>" ])
       Markup the snippet as a HTML string using the specified delimiters or with a default set of delimiters ("<span class="quoted">").

AUTHOR

       Original author: Simon Cozens

       Current maintainer: Tony Bowden

BUGS and QUERIES
       Please direct all correspondence regarding this module to:
	 bug-Text-Context@rt.cpan.org

COPYRIGHT AND LICENSE

	 Copyright (C) 2002-2005 Kasei

	 This program is free software; you can redistribute it and/or modify
	 it under the terms of the GNU General Public License; either version
	 2 of the License, or (at your option) any later version.

	 This program is distributed in the hope that it will be useful,
	 but WITHOUT ANY WARRANTY; without even the implied warranty of
	 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

perl v5.10.1							    2009-07-23							Text::Context(3pm)
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