1. 문자 타입
문자 타입은 " " 따옴표로 묶어줍니다.
var stringType = "문자타입 입니다.";
console.log(stringType);
var myString = "문자 더하기"+ "문자";
console.log(myString);
2. 숫자타입
Integer > 32-bit number ( -2,147,483,648 ~ 2,147,483,647)
Long > 64-bit number (-9,223,372,036,854,775,808 ~ 9,223,372,036,854,775,807)
Float > 3.4E+/-38(7개의 자릿수)
Double > 1.7E+/-308(15개의 자릿수)
var numberType = 5;
console.log(numberType * numberType);
var integerType = 10;
var longType1 = 9223372036854775808;
var longType2 = 9223372036854775807;
var floatType = 3.5;
var doubleType = 9310141419482.22;
3. 기타
var booleanType = true;
var notAnumberType = NaN;
var undefinedType;
var nullType = null;
전체 코드
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<h1>
JavaScript Variables
</h1>
</body>
</html>
<script>
//문자타입
var stringType = "문자타입 입니다.";
console.log(stringType);
var myString = "문자 더하기"+ "문자";
console.log(myString);
//숫자타입
var numberType = 5;
console.log(numberType * numberType);
var integerType = 10;
var longType1 = 9223372036854775808;
var longType2 = 9223372036854775807;
var floatType = 3.5;
var doubleType = 9310141419482.22;
var booleanType = true;
var notAnumberType = NaN;
var undefinedType;
var nullType = null;
console.log(integerType);
console.log(longType1);
console.log(longType2);
console.log(floatType);
console.log(doubleType);
console.log(booleanType);
console.log(notAnumberType);
console.log(definedType);
console.log(nullType);
</script>
결과
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