논리연산자(&&, ||, !)
=============================코드=============================
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
// 논리연산자(&&, ||, !)
let bol1 = true, bol2 = false,
bol3 = true, bol4 = false;
document.write(`${bol1} && ${bol2} >>> ${bol1 && bol2} <br/>`);
// true && false ==> false
document.write(`${bol1} && ${bol3} >>> ${bol1 && bol3} <br/>`);
// true && true ==> true
document.write(`${bol2} || ${bol3} >>> ${bol2 || bol3} <br/>`);
// false || true ==> true
document.write(`${bol3} || ${bol4} >>> ${bol3 || bol4} <br/>`);
// true || false ==> true
document.write(`<hr>`);
/////////////////////////////////////////
let a = "A", b = "B";
// 3은 true 0은 false
// !2는 false
let c = !2 || 3 && !0; // ==> 3(true) && !0(true) / !2(false) || true ==> true
document.write(`c >>> ${c} <br/>`);
// true || false ==> true
c = a < b || a == b;
document.write(`c >>> ${c} <br/>`);
</script>
</head>
<body>
</body>
</html>=============================실행=============================
