Dynamic Memory Allocation in C

Dynamic Memory allocation is the process of allocating memory to program in runtime.

The various dynmaic memory allocation functions available in C are

• Malloc:Allocates specified number of bytes un memory and returns the pointer to the first byte allocated.

           pointer=(cast-type*)malloc(size in bytes)

• Calloc:Creates more than one block of memory and returns the pointer to the first byte in the first block.

          pointer=(cast-type*) calloc(n,size in bytes)

          Here n refers to the number of blocks

• realloc:Used to reallocate a previous allocated memory area.

           pointer=realloc(new pointer,newsize);

• free:Used to clear previously allocated memory so that memory is used efficiently.

          free(pointer name);