golang code jump

Golang is a high-performance programming language. Jumping is a very common requirement when writing large projects. This article will discuss jumps in Golang.

In Golang, there are three types of jumps: goto, break, and continue. They can be used in different scenarios and have different functions.

1. goto statement

The goto statement is the only jump statement in Golang. It can be used to jump to another location in the program. You need to be very careful when using goto statements, as it may cause confusion in the code, making the program difficult to debug. Normally, we should try to avoid using goto statements.

The following is an example of using the goto statement:

func main() {
    i := 0
Label:
    fmt.Println(i)
    i++
    if i < 10 {
        goto Label
    }
}

In this example, we create a label Label and use the goto statement in the loop to jump to this label. Each time through the loop, we print the value of i and use i to increment the value of i. When i is greater than or equal to 10, jump to the label Label.

2. break statement

The break statement is used to exit the current loop. It can be used in for, switch and select statements. When the break statement is executed, the program will jump out of the current loop and continue executing subsequent code.

The following is an example of using the break statement:

func main() {
    for i := 0; i < 10; i++ {
        if i == 5 {
            break
        }
        fmt.Println(i)
    }
}

In this example, we use a for loop to print numbers from 0 to 4. When i equals 5, we use the break statement to break out of the loop.

3. continue statement

The continue statement is used to skip the remaining part of the current loop and execute the next loop. It can be used in for, range and while loops.

The following is an example of using the continue statement:

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

In this example, we use a for loop to print numbers from 0 to 4. When i equals 2, we use the continue statement to skip the current loop and execute the next loop.

Summary

In Golang, we can use goto, break and continue statements to jump. In actual programming, we need to choose the appropriate jump statement according to the specific situation, and try to avoid using goto statements to avoid causing code confusion.

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