Golang的循环语句和循环控制语句详解

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package main

import "fmt"

func main() {
	count := 0
	for i := 0; i <= 10; i++ {
		count += i
	}
	fmt.Println("1到10的数字之和为:",count)
}

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package main

import "fmt"

func main() {
	count := 1
	for ; count < 10; {
		count += count
	}
	fmt.Println("count小于10时自相加的值为:",count)
}

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package main

import "fmt"

func main() {
	count := 1
	for count < 10{  //省略分号
		count += count
	}
	fmt.Println("1到10的数字之和为:",count)
}

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package main

import "fmt"

func main() {

	for { //省略condition
		fmt.Println("死循环")
	}
}

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package main

import "fmt"

func main() {

	for { //省略condition
		fmt.Println("死循环")
	}
}

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package main

import "fmt"

func main() {
	strArray := []string{"a", "b","c"} //字符串数组
	for i,v := range strArray {
		fmt.Println(fmt.Sprintf("下标为：%d 值为：%s", i,v))
	}
}

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package main

import "fmt"

func main() {
	a := 1
	for  {
		a++
		fmt.Printf("a 的值为 : %dn", a)
		if a > 3 {
			/* 使用 break 语句跳出循环 */
			fmt.Printf("跳出循环")
			break
		}
	}
}

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package main

import "fmt"

func main() {
	for i := 1; i <= 2; i++ {
		fmt.Printf("外层循环i: %dn", i)
		for j := 11; j <= 12; j++ {
			fmt.Printf("内层循环j: %dn", j)
			break  //不使用标记，则只会中断该层循环，不会中断外层循环
		}
	}
}

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package main

import "fmt"

func main() {
re:
	for i := 1; i <= 2; i++ {
		fmt.Printf("外层循环i: %dn", i)
		for j := 11; j <= 12; j++ {
			fmt.Printf("内层循环j: %dn", j)
			break re //使用标记，中断外层循环
		}
	}
}

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package main

import "fmt"

func main() {
	for a := 1; a < 5; a++ {
		if a == 3 { //a=3时执行continue跳过
			continue
		}
		//a=3时不会执行打印操作
		fmt.Printf("a 的值为 : %dn", a)
	}
}

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package main

import "fmt"

func main() {
	for a := 1; a < 5; a++ {
		if a == 3 { //a等于3；执行goto跳出
			goto LOOP
		}
		//a=3时不会执行打印操作
		fmt.Printf("a 的值为 : %dn", a)
	}
	LOOP:fmt.Printf("a等于3；执行goto跳出！")
}