I am assuming you are using bash or perhaps a POSIX shell like dash.
Your error is telling you that it is not possible to do such a task as these shells have INTEGER arithmetic only.
If you need floating/fixed point arithmetic then you will have to do workarounds using, bc, dc, python, perl, awk or any other methods that are capable of such mechanisms.
(Just an observation, you have both, ${barr1[$i]} and also ${harr1[j]} are these correct?)
EDIT:
Note the second one should have ${harr1[$j]}
An example longhand using INTEGER arithmetic and FIXED point, OSX 10.14.6, default bash terminal:
Last edited by wisecracker; 10-21-2019 at 02:50 PM..
Reason: See EDIT:
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LEARN ABOUT DEBIAN
bashbug
BASHBUG(1) bashbug BASHBUG(1)NAME
bashbug - report a bug in bash
SYNOPSIS
bashbug [--help] [--version] [bug-report-email-addresses]
DESCRIPTION
bashbug is a utility for reporting bugs in Bash to the maintainers.
bashbug will start up your preferred editor with a preformatted bug report template for you to fill in. Save the file and quit the editor
once you have completed the missing fields. bashbug will notify you of any problems with the report and ask for confirmation before
sending it. By default the bug report is mailed to both the GNU developers and the Debian Bash maintainers. The recipients can be changed
by giving a comma separated list of bug-report-email-addresses.
If you invoke bashbug by accident, just quit your editor. You will always be asked for confirmation before a bug report is sent.
OPTIONS --help
Show a brief usage message and exit.
--version
Show the version of bashbug and exit.
bug-report-email-addresses
Comma separated list of recipients' email addresses. By default the report is mailed to both the GNU developers and the Debian Bash
maintainers.
ENVIRONMENT
DEFEDITOR
Editor to use for editing the bug report.
EDITOR
Editor to use for editing the bug report (overridden by DEFEDITOR).
SEE ALSO bash(1), reportbug(1), update-alternatives(8) for preferred editor.
AUTHOR
This manual page was written by Christer Andersson <klamm@comhem.se> for the Debian project (but may be used by others).
GNU Bash 3.1 11 December 2007 BASHBUG(1)