What are the uses of Java, Python, Javascript, and PHP that are very popular now?

The purpose of developing programs in any programming language is to let the computer do work, such as writing an article, downloading an MP3, etc. And the CPU of the computer only works Understand machine instructions. So ，Although different programming languages ​​are very different，In the end, they all have to be “translated” into machine instructions that the CPU can execute. In theory, any language can do almost anything – but the main purpose is different.

For those who have just entered the IT industry ，maybe they only know how much the salary is for a certain language， But I don’t know what my main job is and I don’t think about the future career development direction. What are Java, Javascript, C, C++, PHP, and Python used to develop? These programming languages ​​will be explained in detail below.

C and C++

C/C++Theoretically you can do any development，as long as you have the right hardware Drivers and APIs are characterized by high efficiency and are basically the most efficient among compiled languages. Unless your system doesn’t even have a C/C compiler. In some systems, the C compiler is not available, but C is generally available. At present, the C language is mainly used to develop low-level modules (such as driver, decoder, algorithm implementation), service applications (such as web servers) and embedded applications (such as microwave ovens). program). C can also do these, but due to C’s complexity and standards issues, people still prefer to use C. C is more suitable for facilities that are more complex but require high efficiency, such as large games, some basic libraries, and large desktop applications.

Summary：

C：system bottom layer，driver，embedded development.

C++：Game Development，Program development for large-scale, high-performance, and distributed requirements.

Java

Java is often associated with “enterprise” because it has some good language features and rich frameworks. The most popular application – you can always hear discussions about things like J2EE, JSP, Hibernate and the like. At the same time, “Java also has a place in the field of mobile phones.” Before widespread intelligence, many mobile phones used supporting Java applications as a selling point. After the outbreak of smart phones, “Java mobile phone home became android” as the standard programming language of Android.

Summary：

Java：webpage，enterprise-level development，ordinary application software，game Backstage.

Javascript

Javascript sounds related to Java，In fact, it has no relationship at all，It’s just a similar name. It’s like the relationship between Leifeng Pagoda and Lei Feng – although there is only one word difference. The most widely used application of JS is undoubtedly in the web front-end. To put it simply, “What the website passes to you is a bunch of documents formatted with various tags” and js is responsible for manipulating these documents to achieve some client-side dynamic effects. The territory of js is not just that – Node.js can now also be used for server-side development.

Summary：

Javascript is the scripting language of the browser， Generally learned together with Html，CSS&#xff0c ;Mainly doing front-end development of the website，Showing all kinds of cool pictures.

PHP

You will often see the words PHP in the browser address bar&# xff0c;So it’s no surprise that PHP is used to develop websites. It is also the king language of web backends – countless website backends run PHP code.

Summary：

PHP is mainly a web front-end used to generate web pages. You can also use PHP for the entire web server, such as many forum engines.

Python

Python is also called a glue language because of its rich and powerful libraries，It can combine various modules made in other languages&#xff08 ;Especially C/C++ are easily linked together. A common application situation is to “use Python to quickly generate a prototype of the program” and sometimes even the final interface of the program, and then use it for the parts that have special requirements. Rewriting in a more suitable language – for example, the graphics rendering module in 3D games – which has particularly high performance requirements – can be rewritten in C/C and then packaged It is an extension class library that Python can call. Python is used for server development and Internet of Things development. Information Security，大多���Processing “data visualization machine learning” and “Internet of Things development” APIs and “desktop applications” of major software require Python.

Summary：

Python：dynamic interpretation，high development efficiency，open source，flexible ，The entry barrier is low.

The above are the main uses of popular programming languages ​​​​that I have compiled. The third quarter of 2020 is about to pass. The small goals you set at the beginning of the year for this year – How far have you accomplished it – and the idea of ​​changing careers or changing jobs has sprouted in your mind – Have you started taking action? >