new returns a pointer to the requested memory if successful or else throws an exception. When using new you need to specify the data type for which the memory is being allocated:
Type* pointer = new Type; //request memory for one element
You can also specify the number of elements you want to allocate that memory for:
Type* pointer = new Type[numOfElements]; //request memory for N element(s)
Every allocation using new needs to eventually be released using an equal and opposite deallocation via delete keyword
delete pointer;
OR
delete[] pointer //release block of allocated memory
Rao, S. (2022). In Sams Teach yourself C++ in one hour A day, Pearson Education.