【Go Programming Learning】Introduction to Go

Environment configuration

1. Go installation package:
download address: https://studygolang.com/dl
2. IDE: GoLand
download address: https://blog.jetbrains.com/go/

GoLand only needs to add the path of the go installation, use the installed go environment to compile without installing any additional plug-ins

Go language features

• Automatic garbage collection
• Richer built-in types
• Function multiple return values
• Error handling
• Anonymous functions and closures
• Type and interface
• Concurrent programming
• reflection
• Language interactivity

Getting to know the Go program

code

package main

import "fmt"

func main(){
    
    
	fmt.println("Hello World!")
}

Procedure description

• Language structure: package declaration introduces package function variable statement & expression comment
• The first line defines a package. All Go source program files must have a package declaration statement at the head. Go manages the namespace through the package
• The third line refers to an external package fmt (standard input/output package). The referenced package can be a standard library package, or a third-party or custom package
• The func keyword declares the function main, and main represents the entry function of the Go program

Source code characteristics

• Suffix .go
• The source program defaults to UTF-8 encoding
• The semicolon at the end of the statement can be omitted
• The "{" at the beginning of the function body must be at the end of the line where the function head is located, and cannot be a separate line
• The package name of the main function must be main
• …