What are pointers? Distinguish between the address stored in the pointer and the value at that address.

A pointer is a derive data type in C. it is built from one of the fundamental data types available in C. Pointer contains memory address contains the instruction and data as a record.

Pointer is used to access and manipulate data stored in the memory. It is also known as referential variable.

All the variables defined in a program stored at specific memory location. If we want to get the address of the variable then we use “&” before the variable name. For example: int x=2;

The above declaration tells the C compiler to perform following actions:

1. Reserve space in the main memory to hold an integer value.

2. Associate the name x with this memory location.

3. Store the value 2 at this location.

       x → location name

       2 → value at the location

  6485 → location address

To get the address of an integer variable, it has to be used with unary operator ‘&’ preceding the variable name. The memory address for the variable x holding the value 2 is 6485.