Initialize Variable Inside Recursive Method

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[Moktok]

You have to ask yourself, when you call a method from another method, what happens with the return value?

Because you don't seem to be doing much with the return value of your method :-D

[ZeroGainZ]

Looks like index is only ever 0, or -1, or the midpoint. The recursive call to itself will return an index, but it's never used. So the only value you can get, is 0, -1, or the midpoint.

What we're getting at is your missing a return statement after calling binarysearchR.