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Subject: Fwd: Re: Rounding off real (floating point) values - bash to awk
Reply-To: moss AT cs DOT umass DOT edu
References: <56574877 DOT 5080100 AT cs DOT umass DOT edu>
To: cygwin <cygwin AT cygwin DOT com>
From: Eliot Moss <moss AT cs DOT umass DOT edu>
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Date: Thu, 26 Nov 2015 13:00:34 -0500
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On 11/26/2015 12:20 PM, Helmut Karlowski wrote:
> ---------------------------------------------------
>> On Thu, Nov 26, 2015 at 10:29 AM, Steven Penny wrote:
>>> echo 3.7 | awk '{printf "%.0f", $0}'
>>
>> Another option
>>
>> awk 'BEGIN {printf "%.0f", ARGV[1]}' 3.7
>
> #4:
>
> printf "%3.0f\n" 3.7

Yes, while bash does not itself "do" floating point arithmetic,
it does have a printf builtin.  Also, you can do computations
using dc, and arbitrary precision calculator program, and you
can control the number of digits of precision used for output,
etc.

Regards -- Eliot Moss


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