Pointers allow variables to store memory addresses of other variables. A pointer contains an unsigned integer value representing the memory address, and its data type depends on the type of variable it is pointing to. For example, an integer pointer would point to an integer variable's memory address. Pointers work by using the ampersand (&) operator to get a variable's memory address, which is stored in the pointer. Then the pointer can be dereferenced using the asterisk (*) operator to access the value at that memory address.

1. Pointers
What you’ll learn:
o Introduction to pointers
o Pointers and arrays
o Pointers and functions

2. Introduction to Pointers
 A pointer is a variable that holds memory address of other variables.
 It always contains an unsigned int value (memory address cant be negative).
 The data type of pointer depends on the data type of variable it is pointing to.

3. How Pointers work
int a = 5;
int *ptr = &a;
5
10000
10000
12895
Memory Address of a
Value of a
Value of ptr
Memory Address of ptr
Variable name
Data type
Variable value
Address of
operator
Variable being
pointed to
Pointer
variable
Data type of
variable
being
pointed to
Indirection(or
value at address)
operator
&a *ptr ptr &ptra