malloc and free functions

The `malloc` and `free` functions are standard library functions used for memory management in C and C++ programming languages. 1. `malloc` function: It stands for "memory allocation" and is used to dynamically allocate a specified amount of memory from the system heap. It returns a pointer to the allocated memory, which can be used to store data of a specific type. 2. `free` function: It is used to release the memory previously allocated by `malloc` or other similar memory allocation functions. By freeing the memory, it becomes available for reuse in the program.

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