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♧9/30 - TCP school [자바스크립트] 불리언/타입오브연산자/null과 undefined

피자돈가스 2022. 9. 30. 13:26

자바스크립트



<불리언>

==








🦔type of🦔


<!DOCTYPE html>
<html lang="ko">

<head>
<meta charset="UTF-8">
<title>JavaScript DataType</title>
</head>

<body>

<h1>typeof 연산자</h1>
<p id="result"></p>

<script>
document.getElementById("result").innerHTML = (typeof 10) + "<br>";
document.getElementById("result").innerHTML += (typeof "문자열") + "<br>";
document.getElementById("result").innerHTML += (typeof true) + "<br>";
document.getElementById("result").innerHTML += (typeof undefined) + "<br>";
document.getElementById("result").innerHTML += (typeof null);
</script>

</body>

</html>









<null과 undefined>