[kyberias]

UB? I don't get the first one.

[pavanky]

Googled it. I think he means undefined behavior.

[EpicEng]

Reading an uninitialized variable is UB.

[barrkel]

Is it a local? I think the int declaration is for showing the type of x. It's just a code fragment as is.

[EpicEng]

Fair point, we don't have context.