Thanks for the many suggestions. I think what is working best for me is using the IO:Tee module. All screen output is also captured in the log file. And as one poster suggested, I just need to add an explicit print to reflect the user input, so it also captured. Here's a simple example:

use IO::Tee;
use IO::File;

my $tee = new IO::Tee(\*STDOUT, new IO::File(">myLogfile.log"));
select $tee;

print  "\nHow old are you: ";
my $age = <STDIN>;
print "\nYou entered $age\n";
my $year = 2017 - $age;
print  "You were born in $year\n"
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