Do the records have the same result?

Question

C++ / C#

...
...
int main(){
int length = 5;
char* arr = new char[length]
.
.
.
delete[] arr;
}
////////////////////////////////////////////////////////////////////////
int main(){
int length = 5;
char* arr = new char[length]
.
.
.
 arr = nullptr;

Will the din area be cleared. memory, if the pointer to the first element is assigned nullptr?
Or will the memory be cleared only with the delete operator?

Answer 1

Anything created with new must be deleted with delete.

Answer 2

The memory will be cleared only through delete, in the second case we will get a leak