File I/O Operations

This example demonstrates how to read from and write to files in Dart.

import 'dart:io';

void main() async {
  // Writing to a file
  var file = File('example.txt');
  await file.writeAsString('Hello, Dart!\nThis is a file I/O example.\n');

  print('File written: ${file.path}');

  // Reading from the file
  String contents = await file.readAsString();
  print('File contents:\n$contents');

  // Appending to the file
  await file.writeAsString('Appending new content.\n', mode: FileMode.append);
  contents = await file.readAsString();
  print('Updated file contents:\n$contents');
}