What does a pointer do exactly ?

Question

some pointer pls

Answer 1

A pointer is a special variable which stores an address of a memory location that contains a certain datatype.

Therefore, using pointers you can access the variable directly in memory when you manipulate your data (through an operation called "dereferencing").
This allows us to pass arguments by reference instead of by value, so you can modify your data through functions you define.

Answer 2

Simple code explaining pointers:

https://code.sololearn.com/c0P4j6Se4qEJ/#cpp

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Answer 3

A pointer is a variable which stores the address of another variable.It can store the address of variable only if the datatype of the variable whose address is to be stored is same as that of the datatype of pointer.
e.g. int x=2; //x is a int var
int *y; //y is a pointer of datatype int.
so it can store the addr. of x.
To store the addresse,
y=&x;
now y points to variable x by storing its address.