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Function Details : free

voidfree(void * ptr) ;

Return Type : void

Type that indicates no return value

Read about return values of free function .

1st Parameter Type : void *

New Generic pointer that can point to any data type

1st Parameter

Pointer to the memory block previously allocated with `malloc`, `calloc`, or `realloc` to be deallocated

Read more about parameters of free in parameters section

The freefunction in C language Frees the memory space pointed to by ptr, which must have been returned by a previous call to malloc or calloc.

The free function deallocates the memory previously allocated by a call to malloc, calloc, or realloc. If ptr is a NULL pointer, no operation is performed. The free function does not return a value. After calling free, the pointer becomes a dangling pointer and should not be used. It's crucial to only free memory that was dynamically allocated and to avoid double-freeing memory.

The freefunction takes 1 parameter:

•
void * `ptr`: Pointer to the memory block previously allocated with `malloc`, `calloc`, or `realloc` to be deallocated

Deallocates the memory block pointed to by `ptr`, which must have been previously allocated by a memory allocation function (`malloc`, `calloc`, or `realloc`). Does nothing if `ptr` is `NULL`.

The free function return value :

This function does not return a value

Output

This example demonstrates the basic usage of `free`. It allocates memory for an array of integers, uses the memory, and then frees it.