What is a pointer in C?

A pointer is a variable that stores the address of another variable. Unlike other variables that hold values of a certain type, pointer holds the address of a variable. For example, an integer variable holds (or you can say stores) an integer value, however an integer pointer holds the address of a integer variable.

int myAge = 43;     // An int variable

int *ptr;

*ptr = &myAge; 

// A pointer variable, with the name ptr, that stores the address of myAge