논리 연산자
\${(10 == 10) && (20 == 20)} : ${(10 == 10) && (20 == 20)}
\${(10 == 10) and (20 == 20) } : ${(10 == 10) and (20 == 20) }
\${(10 == 10) || (20 == 20) } : ${(10 == 10) || (20 == 20) }
\${(10 == 10) or (20 == 20) } : ${(10 == 10) or (20 == 20) }
\${!(10 == 10) } : ${!(10 == 10) }
\${not(10 == 10) } : ${not(10 == 10) }