In-depth understanding of jump statements in Go language

Jump statement is a common flow control statement in programming languages, used to change the order of program execution. In Go language, there are three main types of jump statements: break, continue and goto. This article will delve into the specific usage of these jump statements in the Go language, and attach corresponding code examples.

1. break statement

break statement is used to jump out of the current loop or the execution of the switch statement and terminate the subsequent code block. The following is an example of using the break statement in a for loop:

package main

import "fmt"

func main() {
    for i := 1; i <= 5; i++ {
        if i == 3 {
            break
        }
        fmt.Println(i)
    }
}

In the above code, when the value of i is equal to 3, execute The break statement breaks out of the loop, so only 1 and 2 will be output.

2. The continue statement

continue statement is used to skip the remaining code in the current loop and directly enter the next cycle. The following is an example of using the continue statement in a for loop:

package main

import "fmt"

func main() {
    for i := 1; i <= 5; i++ {
        if i == 3 {
            continue
        }
        fmt.Println(i)
    }
}

In the above code, when the value of i is equal to 3, execute The continue statement skips the code in the current loop and directly enters the next cycle, so only 1, 2, 4 will be output. and 5.

3. goto statement

The goto statement can unconditionally transfer to another location in the program, usually used to jump to a label. The following is an example of using the goto statement:

package main

import "fmt"

func main() {
    i := 1
start:
    fmt.Println(i)
    i++
    if i <= 5 {
        goto start
    }
}

In the above code, the loop output 1 to ## is realized through the goto start statement. #5 effect. It should be noted that in Go language, the use of goto statements should be avoided as much as possible to avoid problems with code readability and maintainability.

Through the above examples, we have a deeper understanding of jump statements in Go language. In actual programming, reasonable use of jump statements can optimize code logic and improve program efficiency.

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