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Full Discussion: Comparing two numbers with decimal point
Top Forums Shell Programming and Scripting Comparing two numbers with decimal point Post 302369547 by radoulov on Monday 9th of November 2009 02:43:54 AM
Old 11-09-2009
Quote:
Originally Posted by cfajohnson
Like bash, expr only does integer arithmetic; you cannot use it with decimal fractions.
I had that doubt after posting the example. Thank you for pointing it out.

Quote:
In any POSIX shell, you can strip the fraction and compare the integer portions. If they are equal, then compare the decimals:
Code:
 if [ ${1%.*} -gt  ${2%.*} ]
then
  printf "%s is larger than %s\n" "$1" "$2"
elif [ ${1%.*} -eq  ${2%.*} ]
then
  : decimal comparison left as exercise for the reader 
else
  printf "%s is smaller than %s\n" "$1" "$2"
fi

I like this approach.
Thanks again!
 

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LEARN ABOUT SUSE

lessecho

LESSECHO(1)						      General Commands Manual						       LESSECHO(1)

NAME

       lessecho - expand metacharacters

SYNOPSIS

       lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-a] file ...

DESCRIPTION

       lessecho  is  a	program  that  simply  echos its arguments on standard output.	But any argument containing  metacharacters  specified	by
       options below is quoted.

OPTIONS

       A summary of options is included below.

       -ox    Specifies "x" to be the open quote character.

       -cx    Specifies "x" to be the close quote character.

       -pn    Specifies "n" to be the open quote character, as an integer.

       -dn    Specifies "n" to be the close quote character, as an integer.

       -mx    Specifies "x" to be a metachar.

       -nn    Specifies "n" to be a metachar, as an integer.

       -ex    Specifies "x" to be the escape char for metachars.

       -fn    Specifies "n" to be the escape char for metachars, as an integer.

       -a     Specifies that all arguments are to be quoted.  The default is that only arguments containing spaces are quoted.

SEE ALSO

       less(1)

AUTHOR

       This manual page was written by Thomas Schoepf <schoepf@debian.org>, for the Debian GNU/Linux system (but may be used by others).

       Send bug reports or comments to bug-less@gnu.org.

							     Version 436: 07 Jul 2009						       LESSECHO(1)
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