Pointer in C.

Pointer in C

• The pointer in C language is a variable, it is also known as locator or indicator that points to an address of a value.

Advantage of pointer

• Pointer reduces the code and improves the performance, it is used to retrieving strings, trees etc. and used with arrays, structures and functions.
• We can return multiple values from function using pointer.
• It makes you able to access any memory location in the computer's memory.

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Usage of pointer

• There are many usage of pointers in c language.

1. Dynamic memory allocation

• In c language, we can dynamically allocate memory using malloc() and calloc() functions where pointer is used.

2. Arrays, Functions and Structures

• Pointers in c language are widely used in arrays, functions and structures. It reduces the code and improves the performance.

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Symbols used in pointer

Address Of Operator

• The address of operator '&' returns the address of a variable. But, we need to use %u to display the address of a variable.

• What is Pointers?
• How to Declaring a pointer?
• Array to Function in C.
• Pointer to Pointer in C.
• Pointer Arithmetic in C.
• Pointer Addition in C.
• Pointer Subtraction in C.
• Dynamic memory allocation in C.
• malloc() function in C.
• calloc() function in C.
• realloc(), free() functions.