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How do I get the value of a number that is part of a string?

by vroom (His Eminence)
on Mar 02, 2000 at 23:27 UTC ( [id://4682]=perlquestion: print w/replies, xml ) Need Help??

vroom has asked for the wisdom of the Perl Monks concerning the following question:

How do I get the value of a number that is part of a string?

Originally posted as a Categorized Question.

Replies are listed 'Best First'.
Re: How do I get the value of a number that belongs to a string??
by chromatic (Archbishop) on Feb 19, 2000 at 02:07 UTC
    Perl will automatically do the right thing with a scalar depending on the context in which you use it. If you were to say:
    my $x = "1"; my $y = "2"; print $x + $y, "\n";
    you'll get 3. If you say:
    my $x = "1"; my $y = "2"; print $x . $y, "\n";
    you'll get 12 ("2" appended to "1"). To force interpretation in a numeric context, you can try:
    my $x = "10abc"; print $x + 0, "\n";
    and you'll get 10. Note that this only works on scalars starting with digits. Strip them out with a regex if you need to.
Re: How do I get the value of a number that is part of a string?
by lalitbans (Novice) on Feb 01, 2010 at 10:48 UTC
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