print PRN "\x02";  # or "\x{02} if the next character is a hex digit.
print PRN "L\n";

##</code><code>##

print PRN "\x02L\n";

##</code><code>##

print PRN chr(0x02);
print PRN "L\n";

##</code><code>##

print PRN pack('C', 0x02);
print PRN "L\n";