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1 - first knowledge of go language

2022-04-23 14:40:00 【Endless character】

What is? Go Language ：Go Is an open source programming language , It's meant to make it easy for people to build simple 、 reliable 、 Efficient software
Go Language advantage
- ①. Fast running speed , Easy to learn
- ②. High salary
- ③. Suitable for blockchain development
- ④. Cross platform
- ⑤. Rich library of standards （ Instructions ）,Go There are a lot of libraries built in , Especially the network library is very powerful
- ⑥.Go It can also directly contain C Code , Take advantage of the existing rich C library
- ⑦. Language level supports concurrency , This is Go The biggest feature , Born to support concurrency
What is concurrency ： All running programs take turns CPU, Each program is allowed to occupy CPU The time is very short （ such as 10 millisecond ）, So the user doesn't feel it at all CPU Is serving multiple programs in turn , It's like all programs are running continuously . The advantage of concurrency is that you can run multiple programs , Not Caton

Go Installation package download address ：https://golang.google.cn/dl/
- There were 32 Bit and 64 Bit installation package , Recommended download .msi Installation package for installation

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Go install ： function msi The installation files , Never appear Chinese in the installation path , All the way Next
GOPATH To configure ： What will be written Go Program code method GOPATH Under the specified directory

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Go Install the test ：cmd Command test
- go version： Output version
- go env： environmental information

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compile Go Code ：go build file name .go What will be written Go Compile the code into a computer executable file
function exe Program ：.\Test.exe
Direct operation Go The source code file ：go run file name .go Will not generate exe file

package main
import "fmt"
func main(){
    
	fmt.Print("Hello Go")
}

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Goland Download address ：https://www.jetbrains.com/zh-cn/go/download/other.html
- According to your system , When the download is complete , All the way next Can be installed