How to deallocate memory in C using free?

The "free" method in the C programming language holds a crucial role in managing dynamic memory allocation. This function is responsible for deallocating memory space that has been previously allocated dynamically, ensuring that resources are not left unutilized.

In C, the malloc() and calloc() functions are commonly used to dynamically allocate memory for variables and data structures whose sizes are not known at compile time. However, these allocations do not automatically release the memory when no longer needed.

This is where the free() method comes into play. It acts as a counterpart to malloc() and calloc(), allowing developers to explicitly free up the memory that has been dynamically allocated. By doing so, it prevents memory leaks and ensures efficient use of memory resources.

The use of free() is essential for maintaining a program's memory footprint under control. Without it, programs could continually consume more and more memory over time, eventually leading to system instability or crashes.

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