Why is undefined behaviour allowed in C

Question

I have been messing around trying to learn C lately. Coming from Java, it surprised me that you can perform certain operations declared as \"undefined\".

This just

Answer 1

Java has a run time environment to take care of you. That's why an exception is thrown when going out of bounds - it's something that can't be figured out at compile time.

There is run time bounds checking in C++ when using the at() method for a vector. It's what distinguishes at() from the []operator