The fs module in Node.js provides file system-related functionality for reading from and writing to files.
Read File (fs.readFile):
• fs.readFile("file.txt", "utf8", (err, data) => { ... }) Reads file.txt asynchronously.
• file.txt: File path to read.
• utf8: Encoding format for file content (optional).
• (err, data) => { ... }: Callback for error handling and receiving file content.
Write File (fs.writeFile):
• fs.writeFile("file.txt", "Hello Node!", (err) => { ... }): Writes “Hello Node!” to file.txt.
• file.txt: File path to write or create.
• "Hello Node!": Data to write.
• (err) => { ... }: Callback for error handling after write operation.