How can I separate Perl variables from text in interpolated strings?

Hello,

print "    $foo", "AAAAAAAA", $foo, "BBBBBBBB";

Let's say I want to use this code with a print <<EOF;:

print <<EOF;
    $fooAAAAAAAA$fooBBBBBBBB";
EOF

That won't work because Perl thinks I have a variable called $fooAAAAAAAA. How can I easily use print << with such lines when I have a long test to print?

From stackoverflow

• Use ${foo}:

  print <<EOF;
      ${foo}AAAAAAAA${foo}BBBBBBBB";
  EOF
  

  : as a small aside, this method also works in a normal string: print "${foo}bar";

• Here's another way to do it using printf:

  printf << EOF, $foo, $foo;
     %dAAAAA%dBBBBBBB 
  EOF
  

  That is, assuming you want to print $foo as a decimal number. You can substitute %d with whatever format you need.