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Top Forums Shell Programming and Scripting floating point arithmetic operation error Post 302670703 by piynik on Thursday 12th of July 2012 10:41:54 AM
Old 07-12-2012
floating point arithmetic operation error

I am writing a script in zsh shell, it fetchs a number from a file using the awk command, store it as a variable, which in my case is a small number 0.62000. I want to change this number by multiplying it by 1000 to become 620.0 using the command in the script

var2=$((var1*1000))

trouble is when the script is run it returns the error message

0.62000: syntax error: invalid arithmetic operator (error taken is ".62000")

I have also tried the following variations, but none of them works

var2=$var1*1000
var2=$var1*1000 | dc

Could someone tell me what is wrong?

Thanks
 

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Compare(3pm)						User Contributed Perl Documentation					      Compare(3pm)

NAME
Struct::Compare - Recursive diff for perl structures. SYNOPSIS
use Struct::Compare; my $is_different = compare($ref1, $ref2); DESCRIPTION
Compares two values of any type and structure and returns true if they are the same. It does a deep comparison of the structures, so a hash of a hash of a whatever will be compared correctly. This is especially useful for writing unit tests for your modules! PUBLIC FUNCTIONS
o $bool = compare($var1, $var2) Recursively compares $var1 to $var2, returning false if either structure is different than the other at any point. If both are undefined, it returns true as well, because that is considered equal. BUGS
/NEEDED ENHANCEMENTS o blessed references compare currently does not deal with blessed references. I need to look into how to deal with this. LICENSE
(The MIT License) Copyright (c) 2001 Ryan Davis, Zen Spider Software Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. AUTHOR
Ryan Davis <ryand-cmp@zenspider.com> Zen Spider Software <http://www.zenspider.com/ZSS/> perl v5.12.4 2011-07-04 Compare(3pm)
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