What are the basic data types of JavaScript not included?

JavaScript is a widely used programming language that can be used to develop web applications, mobile applications, etc. In JavaScript, there are many basic data types, including numbers, strings, Boolean, null and undefined, etc. However, JavaScript’s basic data types do not include some common data types found in other programming languages. In this article, we will introduce these data types.

1. Primitive data types

The basic data types in JavaScript are primitive data types. These types are not objects, but simple values, and cannot be changed. This means that primitive data types are copied rather than referenced during assignments and operations. In JavaScript, primitive data types include numbers, strings, booleans, null, and undefined.

2. Object type

Different from primitive data types, object types are objects created through the Object constructor. In JavaScript, an object is a complex data type that can contain multiple properties and methods. For reference type values ​​(such as object types), the variable stores not the value itself, but a pointer pointing to the memory address where the object is stored.

3. Function type

In JavaScript, a function is also a special object type that can contain code blocks, parameter lists, and function bodies. A function type is defined as a Function object, which can be created using the Function constructor or function literal.

4. Array type

An array is an object type that contains multiple values ​​and can be created using an array literal or the Array constructor. In JavaScript, an array is not a primitive data type because it is an object (rather than a simple value). Arrays can contain elements of different types, including primitive data types and object types, and can even be other nested arrays.

5. Date type

The date type is a special object type used to represent dates and times. In JavaScript, date objects can be created using the Date constructor or a date literal. The date object can obtain various date and time information through its methods, such as year, month, day, hour, minute, second, etc.

6. Regular expression types

A regular expression is a pattern used to match and search strings. In JavaScript, regular expressions can be created using the RegExp constructor or regular expression literals. A regular expression object contains a regular expression pattern and additional properties and methods for manipulating text.

In short, in JavaScript, primitive data types include numbers, strings, Boolean types, null and undefined, while other types such as object types, function types, array types, date types and regular expression types do not Belongs to the category of basic data types. Understanding these different data types and their characteristics can help us write better JavaScript code.

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