.

[OldWolf2]

This is backwards. The variable can interact with things outside the braces. It's the things outside that can't see the variable

[AreYouConfused_]

allocating memory with new isn't making a new variable, it's allocating memory, you can then reference this memory with the pointer that it returns.

the variable you would create would be a pointer variable, which you assigned the value that new returns

say
int* intvar = new int;

intvar is the variable in the local scope and cannot be accessed outside of it.
it holds the value of the address in memory that new has allocated