Answer 1

A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location.

Like any variable or constant, you must declare a pointer before using it to store any variable address.

The general form of a pointer variable declaration is −

type *var-name;

Here, type is the pointer's base type; it must be a valid C data type and var-name is the name of the pointer variable. The asterisk * used to declare a pointer is the same asterisk used for multiplication.

However, in this statement the asterisk is being used to designate a variable as a pointer.

The actual data type of the value of all pointers, whether integer, float, character, or otherwise, is the same, a long hexadecimal number that represents a memory address. The only difference between pointers of different data types is the data type of the variable or constant that the pointer points to.

https://www.tutorialspoint.com/cprogramming/c_pointers.htm