http://www.perlmonks.org?node_id=1011428

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

Hi , I have a small query regarding variable assignments in perl. See the below code. 
$foo = "hello";
my $x = "$foo".$y; # $y is not yet defined.
$y = "world";
print $x;

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This gives output as only hello, seems the variable $y is not dynamically substituted in $x based on the next assignment $y = world. Is there any way to accomplish this like in makefiles we have this type of assignments. I got this situation when i want to create files dynamically with different names using this type of substitution. Any help ???? Thanks in Advance!!!

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