Go language for loop multivariable use

go for The loop syntax is ：

	/* init：  It's usually an assignment expression , Assign initial values to control variables ; condition：  A relational or logical expression , Cycle control conditions ; post：  It's usually an assignment expression , Increment or decrement of a control variable . */
	for init; condition; post {
     
		//......
	}

When using multiple variables , Use parallel assignment , One thing to keep in mind is that post It's about Writing , The code is as follows ：

/*  Wrong writing : 1. Do not conform to the for init; condition; post { } Format , Multivariable assignment can only use parallel assignment ; 2.++ -- Statements, not expressions, cannot be used i++、j++ , You should use i = i + 1、 j = j + 1 */
	func main() {
    
	    sum := 0
 	    for i, j := 1, 10; i < j; i++,j++ {
    
 	    	sum += i + j
 	    }
    	fmt.Println("sum is equal to ", sum)
	}
 
 
/*  Write it correctly  */
	func main() {
    
	    sum := 0
	    for i, j := 1, 10; i < j; i, j = i+1, j+1 {
        //1. accord with for Cyclic init;condition;post Format .2. Use expressions correctly ：i = i + 1, j = j + 1
	        sum += i + j
	    }
	    fmt.Println("sum is equal to ", sum)
	}