Perl regex to extract floating number

Question

I need to modify someone\'s Perl script, and I am not familiar with Perl at all.

There is a scalar variable $var, whose value is a floating point number pos

Answer 1

So I am trying suggested expressions, I guess I am not using them correctly in Perl:

my $var = "123.456.66";
print "old $var\n";
$var =~ s/^\d+(?:\.\d+)?//;
print "new $var\n";

Output:

$perl main.pl
old 123.456.66
new .66