Today we are going to discuss FILE SYSTEM operations using the C language. Till now we have worked with the RAM for storing our variables and our data. But the RAM is not persistent. We need to store data permanently. So we store them in permanent memory like hard disks or CDs/DVDs, in files. Different types of data are stored in different type of files, but for our purposes we’ll work with text files in windows system which have an extension of ‘.txt‘.