[DUPLICATE] What are pointers used for

Question

What are the practical uses of the pointer and when should I use them?

Answer 1

https://www.sololearn.com/discuss/899029/?ref=app
https://www.sololearn.com/discuss/727808/?ref=app

Answer 2

Pointer are references to variable.
char *msg = "Hello world";
// this(msg) holds the reference (memory location) of char 'H'

You should use them when size of input is a variable, like names, messages, etc.
For example:
char *name;
// this pointer to variable "name" can hold large amount of characters