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Thread: Trouble when I try to do without using a compound assignment operator

  1. #1
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    Default Trouble when I try to do without using a compound assignment operator

    I'm encountering some unexpected error messages when I try to do without a compound assignment operator. Here's my code:

    package samsExperiments;
     
    public class SamsArrays {	
     
    	public int getAverage(int[] arr) {
    		int sum = 0;
    		for(int x : arr) {
    			sum + x = sum;
    			(sum + x) = sum;
    			sum += x;
    		}
    	}	
    }

    Line 8 error: "Syntax error on token "+", invalid AssignmentOperator"

    Line 9 error: "The left-hand side of an assignment must be a variable"

    What's wrong? Why does it see an addition symbol as an assignment operator, when the = sign is clearly on the right-hand side of the x variable? And since sum and x are obviously both variables, why is it saying they're not?

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    Super Moderator Norm's Avatar
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    Default Re: Trouble when I try to do without using a compound assignment operator

    Look at the tutorial re the assignment statement: https://docs.oracle.com/javase/tutor...bolts/op1.html

    Basically an assignment statement has a variable to the left of the = and a value to the right.
    If you don't understand my answer, don't ignore it, ask a question.

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