http://www.perlmonks.org?node_id=994711


in reply to How can we interpolate an expression??

use warnings;
use strict;
use 5.14.0;

my $number = 5;
my $multiplier = 3;

say "Product is $number * $multiplier";
say "Product is ", $number * $multiplier;

__END__

Product is 5 * 3
Product is 15

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Re^2: How can we interpolate an expression??
by Rohit Jain (Sexton) on Sep 20, 2012 at 18:14 UTC
    Can't we make your first "say ..." statement to print like the second one?? When we do this: - 
    say "number is $number";

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    It simply replaces the $number with its value.. Shouldn't it do the same for an expression.. or we have to do it in some different way?
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[d/l]
      If the interpreter implemented the interpolation you are specifying, then how could I as a programmer make it output the string Product is 5 * 3? There'd be some pretty non-intuitive side effects.

      Kenosis below has given you a way to be clever, but this is all getting a little clever for my taste. For complex output, I usually prefer going all the way to printf since, after all, you desire a formatted print. So maybe printf "number is %d\n", $number * $multiplier;. toolic's solution still strikes me as pretty clean as well.

      #11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

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[d/l]
[select]

        Yeah it's right that its not worth making simple thing complex.. But just wanted to know whether there is a way to do it. Just for the sake of knowing. Anyways I am going to use the other way.

        And what you are saying about that printf, I haven't reached there, so didn't knew that also existed in Perl. Will sure be interesting to use that.. For now, I am using concatenation using '.' or ','

        Thanks Anyways :)

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