No, that prints "2L\n"

In string literals, the C syntax works in Perl:

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

print PRN "\x02L\n";
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If you start with a variable containing the number 2, you can use chr:

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

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