How to clear all memory in C?

In the C programming language, the `free()` function serves this purpose admirably. It's a standard library function designed specifically to deallocate memory that was previously allocated by the `malloc()`, `calloc()`, or `realloc()` functions.

The `free()` function requires a single argument: a pointer that references the memory block intended for deallocation. This pointer must point to a valid memory block that was allocated by one of the aforementioned memory allocation functions.

By invoking `free()`, the program informs the operating system that the specified memory block is no longer needed, allowing it to be marked as available for reuse. This process is critical in preventing memory leaks, which can eventually lead to reduced performance or program crashes.

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In the realm of programming, managing memory allocation is crucial for efficient and SAFE code execution. When dynamic memory is allocated during program runtime, it's essential to have mechanisms in place to properly release it once it's no longer needed.