We use our own parenthesis ...

With use of the  /g regex modifier, capturing parentheses are not needed (although they do no harm): in list context, all matched sub-strings are returned.

c:\@Work\Perl>perl -wMstrict -MRegexp::Common -le
"$_ =  '10,101,110.11010110';
 ;;
 print qq{'$_'} for /$RE{num}{real}/g;
"
'10'
'101'
'110.11010110'
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The absence of a keep option tells the module not to capture anything.

But I thought that the idea behind the use of  -keep was that justrajdeep wanted to "... divide [the extracted numbers] into floats/integer etc.", i.e., classify them, and for this the capture of number components (sign, whole number, fractional part, etc.) by  -keep could be made to work nicely.

... group and sep options are not specified. They only apply to separations within a single number.

justrajdeep seems to want to handle comma-separated, grouped whole numbers (and binary ones at that), but I agree that his or her requirements are a bit confusing, at least to me.