Characteristics of scripting language: 1. Scripting language is between HTML and C, C, Java, C# and other programming languages; 2. Scripting language is composed of program code; 3. Scripting language is an interpretive The language does not need to be compiled and can be used directly, and the interpreter is responsible for the interpretation; 4. Scripting languages generally exist in text form; 5. Simple, easy to learn, and easy to use.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
Script languages (Script languages, scripting programming languages, scripting languages) were created to shorten the traditional edit-compile-link-run process Computer programming language.
Although many scripting languages have gone beyond the realm of automating simple computer tasks and are mature enough to write sophisticated programs, they are still called scripts. Almost all computer systems have a scripting language at every level. Including the operating system layer, such as computer games, network applications, word processing documents, network software, etc.
In many ways, high-level programming languages and scripting languages overlap with each other, and there is no clear boundary between the two. A script can automate interactive operations that would otherwise be performed using the keyboard.
A Shell script mainly consists of commands that originally need to be entered on the command line, or in a text editor, users can use scripts to combine some common operations into a set of sequences. The language mainly used to write such scripts is called a scripting language. Many scripting languages actually go beyond simple sequences of user commands and allow for the writing of more complex programs.
Characteristics of scripting language:
1. Scripting language (JavaScript, VBscript, etc.) is between HTML and C, C, Java, C# and other programming languages. HTML is commonly used to format and link text. Programming languages are often used to issue a complex series of instructions to a machine.
2. Scripting languages and programming languages also have many similarities. Their functions are more similar to programming languages, and they also involve variables. The biggest difference from programming languages is that the syntax and rules of programming languages are more strict and complex.
3. Relationship with program code: Script is also a language, which is also composed of program code.
4. Scripting language is an interpreted language, such as Python, vbscript, javascript, installshield script, ActionScript, etc. It is not like c\c, which can be compiled into binary code and can be compiled into executable files. The scripting language does not need to be compiled and can be used directly, and the interpreter is responsible for the interpretation.
5. Scripting language generally exists in text form, similar to a command.
For example: If you create a program called aaa.exe, you can open files with the extension .aa, and specify a set of rules (grammar) for writing .aa files. When others write After writing the .aa file, your program uses this rule to understand the author's intention and respond. Then, this set of rules is a scripting language. [5]
6. Compared to compiled computer programming languages: When a program developed in a scripting language is executed, it is interpreted and executed by its corresponding interpreter (or virtual machine). System programming languages are pre-compiled into machine language for execution. The main characteristics of scripting languages are: the program code is the script program and the final executable file. Scripting languages can be divided into independent and embedded types. Independent scripting languages completely rely on the interpreter when executing, while embedded scripting languages are usually embedded in programming languages (such as C, C, VB, Java, etc.).
7. Compared with system programming language: The difference is that script language is interpreted while system programming language is compiled. Interpreted languages provide fast translation due to no compile time, by allowing users to write applications at runtime without the need for time-consuming compilation/packaging processes. The interpreter makes applications more flexible, and scripting language code can be generated and executed in real time. Scripting languages usually have the characteristics of being simple, easy to learn, and easy to use. The purpose is to allow program designers to quickly complete program writing work.
Advantages
Rapid development: The scripting language greatly simplifies the "development, deployment, testing and debugging" cycle process.
Easy to deploy: Most scripting languages can be deployed at any time without the need for time-consuming compilation/packaging processes.
Integration with existing technologies: Scripting languages are surrounded by component technologies such as Java or COM, so they can effectively utilize code.
Easy to learn and use: Many scripting languages generally have lower technical requirements, making it easier to find a large number of suitable technicians.
Dynamic code: Script language code can be generated and executed in real time. This is an advanced feature and is very useful in certain applications (such as dynamic typing in JavaScript) Also required.
Disadvantages
Script languages are not comprehensive enough: they require the existence of a "real" programming language and a database driver must be found Build it into the scripting language.
Scripting languages are not the best choice for software engineering and building code structures, such as object-oriented and component-based development.
Scripting languages are usually not "general purpose" languages, but can be adapted to specific applications, such as PHP.
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