2024-10-11
<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
// 1. 숫자(number) 자료형
let su = 100;
su = su + 100;
console.log(typeof su);
document.write("su >>> " + su + "<br>");
document.write("<hr>");
// 2. 문자형(string) 자료형
let name = "세종대왕";
console.log(typeof name);
document.write("name >>> " + name + "<br>");
document.write("<hr>");
// 3. 논리(boolean) 자료형
let bol1 = (20 > 10); // true
let bol2 = (20 < 10); // false
console.log(typeof bol1);
document.write("bol1 >>> " + bol1 + "<br>");
document.write("<hr>");
console.log(typeof bol2);
document.write("bol2 >>> " + bol2 + "<br>");
document.write("<hr>");
// undifined 자료형
let data;
console.log(typeof data);
document.write("data >>> " + data + "<br>");
</script>
</head>
<body>
</body>
</html>
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