C fclose Function Explained

In C language, the fclose function can be used to close a file.

The function prototype is:

Close the file associated with the stream.

stream is a pointer to a FILE structure that points to the file to be closed.

The fclose function is used to close a file that was previously opened, and release the resources associated with it. Before closing the file, it flushes the buffer to write the data from the buffer to the file. When the file is successfully closed, the function returns 0; if the file fails to close, the function returns EOF.