Rounding off real (floating point) values - bash to awk
Eliot Moss
moss@cs.umass.edu
Thu Nov 26 15:32:00 GMT 2015
On 11/26/2015 8:24 AM, Lester Anderson wrote:
> Hello,
>
> I can use a script like:
>
> #!/bin/bash
> x=3.7
> # pass variable x to awk via -v (var=value)
> awk -v x=$x 'BEGIN { printf "%3.0f\n", x }'
> #
>
> which returns the value 4 as expected, but are there any other methods
> that can be used?
In bash this must be a string (bash uses only fixed width integers for numbers),
so you can put as many decimal places as you like. awk will treat it as a string
or floating point number, depending on context. The f output format forces conversion.
Another way is to do arithmetic; even x+0 will do it. IIRC, all numbers in awk are
doubles (IEEE 64-bit floats). The documentation on awk can tell you more about
conversions, rounding, etc.
Regards -- Eliot Moss
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
More information about the Cygwin
mailing list