C Reference function free()

If you have allocated a memory block with the functions malloc(), calloc() or realloc() then you need to free the previously allocated memory.

Usage of free():

void free ( void * ptr );

Parameters:

The parameter is a pointer to a memory block that was allocated with malloc(), calloc() or realloc(). If you pass a null pointer then there will no action occur.

Return value:

No return value by the function free().

Source code example of free():

	#include<stdio.h>
	#include<stdlib.h>

	int main ()
	{
		int * buffer;

		/*get a initial memory block*/
		buffer = (int*) malloc (10*sizeof(int));

		/*free initial memory block*/
		free (buffer);
		return 0;
	}