Code: is the machine language translation adult can understand the language of
the American Standard Code for Information Interchange << ASSIC >> this table is the equivalent syntax table behind with the development has emerged: gb2312 - to - gbk18030 ASSIC-- . 8-to --Unicode-- to --UTF
; ASSIC unified each character needs to store 8 bit Unicode which is backward compatible gbk, gb8030 the
computer capacity of
a 1bit =
8bit = 1byte. 1 byte =
1024bytes = 1kbytes = 1KB 1024 characters, small documents, hundreds of k can represent a picture
1024KB = 1Million Bytes = 1MB = 1 trillion, Jiwan Zi document, the big picture
1024MB = 1Gigabytes, a clear film, not HD, 10 can reach several G
1024GB = 1TB,
1024TB = 1PB,
Programming Language Introduction
What is a programming language?
Well-defined set of grammatical rules-computer interaction, this rule can be called a programming language,
Chinese people do not understand Japanese because the Japanese do not understand the rules of grammar
school programming == learn the rules of grammar
combined heap a lot of instructions == "software
has many sets of interacting with a computer grammar rules,
more than 600 kinds of programming languages
C = each operating system development language 1973
C ++ = C ++ is a C language enhanced version, 1983, C language based on Bell labs Bjarne Stroustrup in launched a C ++ [1]. C ++ to further expand and improve the C language, an object-oriented programming language.
java = 1995 developed by the sun's out, java virtual machine supports cross-platform
php = 1994, pure web development language, 1994 Netscape browser was born
python = born in 1989, just beginning to be used as a scripting language to develop small tasks with linux born the same year, 89,1991, the Soviet Union collapsed in 1991, the official version of
C # = c sharpe = C # is an object-oriented Microsoft released that runs on high-level programming language on the .NET Framework. And is scheduled to debut on the professional Microsoft developer forum (PDC). C # is Microsoft's latest achievements of a researcher Anders Hejlsberg. Java and C # looks surprisingly similar; it includes, such as single inheritance, interfaces, and almost the same Java syntax and compiled into intermediate code and run the process. However, C # and Java is significantly different, it draws a feature of Delphi, and COM (Component Object Model) is directly integrated, and it is the protagonist of Microsoft's .NET windows network framework.
= Ruby
Ruby, a quick and easy object-oriented (Object Oriented Programming) scripting language, in the 1990's by the Japanese Yukihiro Matsumoto (Yukihiro Matsumoto) development, compliance with the GPL and Ruby License. It was inspired and features from Perl, Smalltalk, Eiffel, Ada, and Lisp language. By the Ruby language itself has developed a JRuby (Java platform), IronRuby (.NET platform) and other platforms Ruby language alternatives. Ruby author on February 24, 1993 to start writing Ruby, until December 1995 was officially released to the public fj (newsgroups). Because Perl pronunciation and June birthstone pearl (pearl), and thus to Ruby ruby birthstone of July (ruby) name.
Ruby on rails web framework
on perl = Unix platform developed language, do word processing is very powerful, you can write code that no one can read
shell = scripting language, easy to learn, based on unix, linux, do some simple systems management tasks, operation and maintenance personnel will learn
scalar = Scala is a multi-paradigm programming language, a similar java programming language [1], big data development
erlang = is a common-oriented concurrent programming language, which consists of Swedish telecoms equipment maker Ericsson, functional programming
go === Go language is Google's second 2009 release open source programming language. Go language is optimized for multi-processor system programming applications, use the Go program comparable to the speed of compiled C or C ++ code, and more secure, support for parallel processes.
javascript = is the current most widely used language, the front end of the main written language,
nodejs = back-end full-stack language
vb = Microsoft's scripting language, bat script
lua = nginx scripting language, ngnix is among the most nb web server
python Category:
Compiled = fully translated and then executed, translation = compile, c, c ++
interpreter = side edge to perform translation, python php java c # perl ruby javascript
environmental installation
https://www.python.org/ can find the latest on this site Python version Download