unary operator 2 topics · 2 sources Technology› ProgrammingJavaAn operator taking a single operand. Java's unary operators are -, +, !, !, ++ and --.David J. Barnes — Object-Oriented Programming with Java Cite Technology› ProgrammingPerlAn operator with only one "operand", like ! or chdir. Unary operators are usually prefix operators; that is, they precede their operand. The ++ and -- operators can be either prefix or postfix. (Their position does change their meanings.)Perl — Perl Glossary Cite