Go Switch - Go 中使用 Switch 的六种方式

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发布于: 刚刚

译者：baiyutang
原文：https://dev.to/eternaldev/go-switch-6-ways-of-using-switch-in-go-5a0l

基本

Switch case is commonly used there are multiple condition checks to be done for a particular variable. It is easier to understand than having multiple if statements in your code. Switch statement evaluates the expression and executes the block of code that matches from the list of possible choices

package main
import "fmt"
func main() {    status := 1
    switch status {        case 0:            fmt.Println("Status - Todo")
        case 1:            fmt.Println("Status - In progress")
        case 2:            fmt.Println("Status - Done")    }
}

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带有 default 语句

package main
import "fmt"
func main() {    status := 1
    switch status {        case 0:            fmt.Println("Status - Todo")
        case 1:            fmt.Println("Status - In progress")
        case 2:            fmt.Println("Status - Done")
        default:            fmt.Println("Not valid status")    }
}

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package main
import "fmt"
func main() {    status := 1
    switch {        case status == 0:            fmt.Println("Status - Todo")
        case status == 1:            fmt.Println("Status - In progress")
        case status == 2:            fmt.Println("Status - Done")
        default:            fmt.Println("Status - Not valid")    }
}

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case 列表

package main
import "fmt"
func main() {    status := 4
    switch status{        case 0:            fmt.Println("Status - Todo")
        case 1:            fmt.Println("Status - In progress")
        case 2, 3, 4:            fmt.Println("Status - Done")
        default:            fmt.Println("Status - Not valid")    }
}

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fallthrough 语句

package main
import "fmt"
func main() {
    switch status := 3; {    case status < 2:        fmt.Println("Status is not done")    case status < 4:        fmt.Println("Status is done")        fallthrough    case status > 6:        fmt.Println("Status is done but has some issues")    }
}

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break 语句

package main
import "fmt"
func main() {
    switch status := 2; {    case status < 2:        fmt.Println("Status is not done")    case status < 4:        fmt.Println("Status is done")        if (status == 2) {            break;        }        fallthrough    case status > 6:        fmt.Println("Status is done but has some issues")    }
}

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发布于: 刚刚阅读数: 3

原文链接:【http://xie.infoq.cn/article/38ccccd0d0ff989689484c146】。

baiyutang

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Go Switch - Go 中使用 Switch 的六种方式

基本

带有 default 语句

case 列表

fallthrough 语句

break 语句

baiyutang

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