What are the basic data types of JS?

The basic data types of JS are as follows: Number, String, Boolean, Null, and Undefined.

1. Number: used to represent numbers, including integers and floating point numbers. For example:

let num1 = 10; // 整数
let num2 = 3.14; // 浮点数

2. String: used to represent text data. Strings need to be enclosed in quotes (single or double quotes). For example:

let str1 = 'Hello'; // 使用单引号
let str2 = "World"; // 使用双引号

3. Boolean value (Boolean): used to represent true (true) or false (false). For example:

let isTrue = true; // 真
let isFalse = false; // 假

4. Null: used to represent an empty value. For example:

let emptyValue = null;

5. Undefined: used to represent a variable that has not been assigned a value. For example:

let undefinedValue;

The above are the basic data types of JS and their corresponding code examples. In actual development, we often use these data types to store and operate different data.

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