Hi,
It all depend on what you exactky want. e.g:

#!/usr/bin/perl  -t -w

use strict;

sub dosplitMe () {
        my ($x,$justSplitMe) = @_;

        if ($justSplitMe) {
                my ($y, $z) = split(/\./, $x);
                return ($y, $z);
        } else {
                # there might be stuff before first integer...
                my ($y,$z);
                if ($x =~ m/(\D+)?(\d+)\.(\d+)/) {
                        ($y, $z) = ($1.$2 , $1.$3);
                }
                return ($y, $z);
        }
}

my $num1 = 123.456;
my $num2 = -123.456;
my $num3 = "abc123.123";

my @a;
@a = &dosplitMe($num1,1);   print ("1: $a[0] - $a[1] \n");
@a = &dosplitMe($num2,1);   print ("2: $a[0] - $a[1] \n");
@a = &dosplitMe($num2,0);   print ("3: $a[0] - $a[1] \n");
@a = &dosplitMe($num3,1);   print ("4: $a[0] - $a[1] \n");
@a = &dosplitMe($num3,0);   print ("5: $a[0] - $a[1] \n");
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*** update: *** Or even better:

#!/usr/bin/perl  -t -w

use strict;

sub dosplitMe () {
        my ($x,$separator,$justSplitMe) = @_;
        if ($justSplitMe) {
                if ($x =~ m /(.*)?$separator(.*)/) {
                        return ($1,$2);
                }
        } else {
                # there might be stuff before first integer...
                if ($x =~ m/(\D+)?(\d+)$separator(\d+)/) {
                        return ($1.$2 , $1.$3);
                }
        }
}

my $num1 = 123.456;
my $num2 = -123.456;
my $num3 = "abc123,123";

my @a;
@a = &dosplitMe($num1,'\.',1);   print ("1: $a[0] - $a[1] \n");
@a = &dosplitMe($num2,'\.',1);   print ("2: $a[0] - $a[1] \n");
@a = &dosplitMe($num2,'\.',0);   print ("3: $a[0] - $a[1] \n");
@a = &dosplitMe($num3,',', 1);   print ("4: $a[0] - $a[1] \n");
@a = &dosplitMe($num3,',', 0);   print ("5: $a[0] - $a[1] \n");
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