Detailed explanation of jump statements in Go language

Title: Detailed explanation of jump statements in Go language

In Go language, jump statement is a special statement used to change the execution order of the program . Jump statements include break, continue, and goto, etc. They can help us control the flow of the program more flexibly. This article will combine specific code examples to explain in detail the usage and precautions of jump statements in the Go language.

break statement

break statement is used to break out of the current loop, whether it is a for loop, switch statement or select statement. The following is an example:

package main

import "fmt"

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

In the above example, when i is equal to 3, execute the break statement to jump out of the loop, and the output result is:

1
2

continue statement

continue statement is used to skip the remaining code of the current loop and enter the next loop. The following is an example:

package main

import "fmt"

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

In the above example, when i is equal to 3, execute the continue statement to skip fmt.Println(i) , directly enter the next loop, the output result is:

1
2
4
5

goto statement

goto statement can be unconditionally transferred to another label position in the program. The goto statement should be used with caution to avoid damaging program structure and logic. The following is an example:

package main

import "fmt"

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

In the above example, the program jumps to the loop label position through the goto statement, realizing a loop printing 1 to 5 function, the output result is:

1
2
3
4
5

Through the above examples, we explain in detail the usage and precautions of jump statements in Go language. Reasonable use of jump statements can make the code logic clearer and more efficient, but excessive use of jump statements can also easily make the code difficult to maintain and understand. In actual development, jump statements need to be used rationally according to specific circumstances to avoid abuse.

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