Go language multiple return values and return error types

go Languages can return multiple values . If I want to return more values , What shall I do? ？

The code is as follows ：

func Chen(a int, b int) (int,int) {
    
	if a == 0 || b ==0 {
    
		return 0,0
	} else {
    
		return a * b, a*b
	}
}

Suppose there is a value error , I want to tell him the reason for the mistake . At this time, you can return values and error objects ,

func Chu(a int, b int) (int,error) {
    
	if b == 0 {
    
		return 0,errors.New(" error ！！")
	}else {
    
		return a / b,nil
	}
}

Test a wave ：

func main() {
    
	// Multiple return data 
	res ,res2 := count.Chen(100, 1)
	fmt.Println( res)
	fmt.Println( res2)
	// Wrong type data 
	res ,err := count.Chu(1, 0)
	if err != nil {
    
		fmt.Println(err)
	}
	fmt.Println(res)
}

Output results ：
100
100
error ！！
0