List of Golang flow control statements: Let your program control the overall situation!

Title: List of Golang flow control statements: Let your program control the overall situation!

In the Go language, flow control statements are an integral part of writing programs. By flexibly using flow control statements, we can allow the program to execute different logic according to different conditions, achieving more flexible and powerful program functions. This article will delve into the flow control statements in Golang and give you a comprehensive understanding of the usage and functions of these statements.

1. Conditional statement

1.1 if statement

The if statement is the most basic conditional statement, and the corresponding code block is executed according to the true or false condition.

package main

import "fmt"

func main() {
    x := 10

    if x > 5 {
        fmt.Println("x大于5")
    } else {
        fmt.Println("x小于等于5")
    }
}

1.2 switch statement

The switch statement can replace multiple if-else statements and execute different logic according to different conditions.

package main

import "fmt"

func main() {
    day := 2

    switch day {
    case 1:
        fmt.Println("星期一")
    case 2:
        fmt.Println("星期二")
    default:
        fmt.Println("其他")
    }
}

2. Loop statement

2.1 for loop

The for loop is to perform a specific number of loop operations.

package main

import "fmt"

func main() {
    for i := 0; i < 5; i++ {
        fmt.Println(i)
    }
}

2.2 range loop

Range is used to traverse data structures such as arrays, slices, and strings.

package main

import "fmt"

func main() {
    fruits := []string{"apple", "banana", "orange"}

    for index, value := range fruits {
        fmt.Printf("索引：%d，值：%s
", index, value)
    }
}

3. Jump statement

3.1 break statement

The break statement is used to break out of the loop.

package main

import "fmt"

func main() {
    for i := 0; i < 5; i++ {
        if i == 3 {
            break
        }
        fmt.Println(i)
    }
}

3.2 continue statement

The continue statement is used to skip the remaining logic of the current loop.

package main

import "fmt"

func main() {
    for i := 0; i < 5; i++ {
        if i == 2 {
            continue
        }
        fmt.Println(i)
    }
}

Through the above examples, we can see that the use of flow control statements in Golang is very flexible, allowing the program to control the overall situation according to different conditions and needs. I hope this article will help you understand and master Golang flow control statements!

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