What is the main difference between the normal C variable and pointer variable?

Ordinary variables hold values of their type while pointers always hold addresses. Notice that pointer variable holds address; address of some variable or pointer variable while ordinary variables hold values of their respective types.

How does pointer variable differ from other variable?

A pointer variable (or pointer in short) is basically the same as the other variables, which can store a piece of data. Unlike normal variable which stores a value (such as an int, a double, a char), a pointer stores a memory address.

What does a pointer point to C?

The Pointer in C, is a variable that stores address of another variable. A pointer can also be used to refer to another pointer function. A pointer can be incremented/decremented, i.e., to point to the next/ previous memory location. The purpose of pointer is to save memory space and achieve faster execution time.

What is the difference between pointer and references explain using program?

Pointers: A pointer is a variable that holds memory address of another variable. A pointer needs to be dereferenced with * operator to access the memory location it points to. References : A reference variable is an alias, that is, another name for an already existing variable.

How can you declare pointer variable differentiate a variable address and variable value How do you access variable value using pointers explain?

Steps:

1. Declare a normal variable, assign the value.
2. Declare a pointer variable with the same type as the normal variable.
3. Initialize the pointer variable with the address of normal variable.
4. Access the value of the variable by using asterisk (*) – it is known as dereference operator.

How a pointer can be used to reference a variable?

References are used to refer an existing variable in another name whereas pointers are used to store address of variable. A reference variable can be referenced by pass by value whereas a pointer can be referenced but pass by reference.

Which of these are reasons for using pointers?

(A) Pointers allow different functions to share and modify their local variables. (B) To pass large structures so that complete copy of the structure can be avoided. (C) Pointers enable complex “linked” data structures like linked lists and binary trees.