Explanation of for loop in golang

Special Usage 1:
Be similar to while Usage of

func main(){
    
	i := 2
	for i<4 {
    
		fmt.Println("hello")
		i++
	}
}

for Dead cycle usage , Usually and break Use it together
That is to say for In circulation , First, judge the conditions of variables , And then in the follow-up work

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

for range Realization

//  Method four ：  Use for range Judge 
//  Use string as an example 
func main(){
    
	str := "hello  Lu Changqi ！"
	for i:=0; i<len(str); i++{
    
		//  In case of garbled code 
		// h e l l oåéå
		fmt.Printf("%c \n", str[i])
	}
	fmt.Println("---------------------------")
	//  The solution to garbled code ：
	//  Method 1 ：  Turn into rune[]
	rune_str := []rune(str)
	for i:=0; i<len(rune_str); i++{
    
		fmt.Printf("%c \n", rune_str[i])
	}
	//  Method 2 ：  Use for range Traversal 
	for _, val := range str{
    
		fmt.Printf("%c \n", val)
	}
}

while and do while The implementation of the

// while  and  do while  The implementation of the 

// while The implementation of the 
func main6(){
    
	i := 0
	for{
    
		if i>=10{
    
			break
		}
		fmt.Println(i)
		i++
	}
}

// do while The implementation of the 
func main(){
    
	i:=0
	for {
    
		fmt.Println(i)
		i++
		if i>=10{
    
			break
		}
	}
}