#!/usr/bin/perl
# Figure 13.7: fig13_07.pl
# Interpolating function returns into a double quoted string.

use warnings;
use strict;

print( "The number is square( 5 ).\n" );
print( "The number is ${ \square( 5 ) }.\n" );

sub square
{
   my $x = shift();
   return $x * $x;
}

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