Replacing array element with its negation in java-CodePudding

VERY new to java (first class of the intro course) and am having some trouble with writing a function that replaces each element in an array with the same integer but negative. I wrote this code:

int negation(int[] x) {
    for (int i = 0; i < x.length; i  ) {
        if (x[i] != 0)
            x[i] = -x[i];
    }

    return x;
}

but when executing it get the error

Expression has type int[], but an expression of type int was expected

on line 6. Not sure what this means exactly as I thought putting 'int[] x' made sure an array was expected, but apparently that isn't enough. Do I need to declare x as an array anywhere else?

CodePudding user response：

You're returning x which is of type int[] but your method is declared as returning int.

Declaring your method as returning int[] by changing it to int[] negation(int[] x) should do it.

CodePudding user response：

Try this

int[] negation(int[] x)

Returning just x should have the matching returning type in the function declaration.

If you return x[0] for example it would match the function declaration.