Go language keyword reference guide

Go Language Keyword Reference Guide

Go language is a concise and fast compiled programming language with excellent concurrency capabilities. One of the first steps in learning the Go language is to become familiar with its keywords.

Keywords are reserved words with special meaning and cannot be used as variable, function or type names. The following table summarizes all Go keywords:

Keyword	Meaning
break	Terminate a loop or switch statement
case	Define conditions in a switch statement
chan	Create or receive channel
const	Declare constants
continue	Skip the current iteration of the loop
default	Define the default situation in the switch statement
defer	Execute a before the function returns Or multiple functions
else	The veto condition of the expression block
fallthrough	Allow multiple situations to be handled in a switch statement
for	Create a loop
func	Define function
go	Start coroutine
if	Expression condition block
import	Import external package
interface	Define interface type
map	Create mapping type
package	Define package
range	Traverse a collection in an iterator
return	Return an or from a function Multiple values
select	for concurrent receive communication
struct	Define structure type
switch	Execute different code blocks based on conditions
type	Define type
var	Define variable

Practical case

The following is an example using some common Go keywords:

package main

import "fmt"

func main() {
    // 定义常量
    const myConst = 10

    for i := 0; i < myConst; i++ {
        fmt.Println(i)
    }

    // 使用 fallthrough 在 switch 语句中处理多个情况
    switch i {
    case 1:
        fmt.Println("i is 1")
        fallthrough
    case 2:
        fmt.Println("i is 2")
    }
}

Output:

0
1
2
i is 1
i is 2

Hope this guide can help you understand and use Go keywords to write Go programs more efficiently.

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