Exceptions in C++
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2Exceptions are an alternative way to return from a function. Rather than returning a value, they cause the flow of control to go up each scope until it finds a try/catch block that catches the type of exception it throws, and then transfers control to that control block.
This is commonly used when we *can't* return a value from a function, like when you do vec.at() on something that doesn't exist, because any value returned would be wrong.
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