How do I return this variable using if statements?

Question

I know this might be a silly question, with an easy answer, but after an hour of searching the internet I could not find a way to do this;

    public bool GetCollision(int x, int y)
    {
        bool isPassable;

        if (x < 0 || x >= 20)
        {
            isPassable = false;
        }

        if (y < 0 || y >= 20)
        {
            isPassable = true;
        }

        return isPassable;
    }

On the second-to-last line it says that isPassable is unassigned... yet clearly I assign to it in the if statements. There must be some fundamental misunderstanding of "if" statements on my part.

So, how can I do this? Thank you very much.

Answer 1

That is because it doesn't have a default value set explicitly. Set isPassable to False by default and you're done.

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Also you can do something like this:

return (!(x < 0 || x >= 20) && (y < 0 || y >= 20))

EDIT: The above solution would only work if an AND relationship would exist between your IFs.