“This is the 11th day of my participation in the Gwen Challenge in November. See details: The Last Gwen Challenge in 2021”

Write at the front 👀

Break, Continue, goto🧈

1. Label 🍞

Field declarations can be followed by an optional string literal (tag) called the property 🥐 for all fields in the corresponding field declaration

  1. All three statements can be used with labels
  2. The label name is case sensitive (uppercase is recommended). If you do not use it later, a compilation error will occur
  3. The continue and break tags can be used to jump out of multiple loops
  4. Goto adjusts the execution position and is not the same as the result of the continue and break tags

Break statement 🥨

In Go, break can terminate the for, swich, and slect blocks 🥯

  • Grammar 👇
break
break label
Copy the code
  • Sample 👇
package main

import "fmt"

func main(a) {
	/* Tag marks the position of the outer loop */
OuterLoop:
	for i := 0; i < 10; i++ {
		fmt.Printf("💗 \ n")
		for j := 0; j < 10; j++ {
			fmt.Printf("💖 \ n")
			if i == 1 && j == 1 {
				/* Jump out of the OuterLoop code block */
				break OuterLoop
			}

		}
	}
	fmt.Println("Break out of multiple cycles.")}Copy the code
  • Results 👇

The continue statement 🥯

In Go, continue can only be used for, to skip the current loop once 🥖

  • Grammar 👇
continue
continue label
Copy the code
  • Sample 👇
package main

import (
	"fmt"
	"time"
)

func main(a) {
	j := 1
	for i := 1; i <= 10; i++ {
		time.Sleep(time.Second)
		if i >= 5 && i <= 7 {
			fmt.Printf("Pause %d seconds! \n", i4 -)
			continue
		} else {
			fmt.Println(j)
			j++
		}

	}
}


Copy the code
  • Results 👇

Goto statement 🧀

In Go, the goto statement can unconditionally transfer the label position. Usually used in conjunction with conditional statements, can be used to achieve conditional transfer, form a loop, out of the loop body functions 🥗

However, goTO statements are generally not recommended in structured programming, so as not to cause confusion in the program flow and make it difficult to understand and debug the program.

  • Grammar 👇
goto label
Copy the code
  • Sample 👇
package main

import (
	"fmt"
	"time"
)


func main(a) {
	for i := 1; i <= 10; i++ {
		time.Sleep(time.Second)
		if i == 5 {

			goto Out
		}
		fmt.Println(i)
	}
Out:
	fmt.Println("Count to five and I'll study!")}Copy the code
  • Results 👇

Write it at the back 🙌

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