Positive test cases and negative test cases

Question

what are positive test cases and negative test cases?

Upon googling about it i have found answers that are very confusing. Can anyone explain with

Answer 1

A positive test case is when the test is designed to return what is expected according to the requirement.

A negative test case is when the test is designed to determine the response of the product outside of what is defined.

You don't determine the type of test by the results, but by the expected result based on the input.

Hope it makes sense, here's a good example http://osdir.com/ml/programming.software-qa/2004-12/msg00060.html