Brother Lian Blockchain technology training share go language learning

The go language, as a server programming language, is suitable for processing logs, data packaging, virtual machine processing, file system, distributed system, database agent, etc. in network programming, the go language is widely used in Web applications, API applications, download applications, etc. in addition, the go language is also available for in-memory databases and cloud platform areas, At present, many foreign cloud platforms are using go development.

Brothers even the go language + Blockchain training courses Total 22 weeks of study duration, divided into 9 learning stages, that is, the main blockchain language-go language development practice, the Blockchain backend technology system-go Language high concurrency and server development, go development Zone block chain public chain (blockchain cryptography, distributed programming, Consensus algorithms, basic concepts, Golan Development), ETH and smart contracts and Dapp development, blockchain distributed application development, blockchain system framework development-Super ledger and Blockchain 3.0EOS, go and blockchain interview hardening and advanced enterprise-level project combat.

1. Import the package, a main function has only one main function, contains a main package, the main function we want to declare the main package!

Package Main

Func Main () {

}

2. Introduce package files, for example, we use the FMT package, print Helloword, Golang has a package visibility definition, such as private in other languages, protected these declarations. When the handwritten letter is lowercase is available in the package, outside the package can not be used, handwritten letters uppercase, reference package can be used! As an example: FMT. Println (); we'll find that the functions we use and reference are capitalized! The lowercase will call the wrong!

Package Main

Import "FMT"

Func Main () {

Fmt. Println

}

3. Package obfuscation mechanism, we can package the alias, for example, we feel that the package cannot remember or say the name of the package is similar to the use of this alias mechanism!

Package Main

Import str "FMT"

Package Main () {

Str. Println

}

4. Shorthand for multiple packages, constants, global variables, generic types, and more. When we have multiple constants, packages and so on how to declare it

Import (const (VAR (

"FMT" PI = "3.1415926" name =1

"NET" NAME = "Widuu" Age =12

"IO" age = "a" Wo = "Me"

)))

5. Declaration of variables and value of assignment and declaration

When there's no assignment, we'll find this.

When declared int float output is 0 declaration bool output is false

The reference packet math outputs the maximum value and the minimum value, such as the value of the maximum Int16 range FMT. Println (Math. MaxInt16)

6. Type declaration We can customize the type declaration, such as the following

Package Main

Import Std "FMT"

Type text string

Func Main () {

var a text

A = "Hello"

Std. Println (a)

}

7. Type Conversion

var a float32 = 100.01

B:=int (a)//output A is the value of 100.01 output B is 100

var c int = 65

D:=string (c)//output is a which is directly converted to text form a

B:=strconv. Itoa (c)//So the output is 65 direct text output

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