diff --git a/src/core/note_app.dart b/src/core/note_app.dart
index 39a3f92..c1f8f18 100644
--- a/src/core/note_app.dart
+++ b/src/core/note_app.dart
@@ -1,6 +1,133 @@
+import 'dart:io';
+
+class note {
+  String? NoteName, Note; //Works as long as the note is less than 2,147,483,647 characters...
+  note({this.NoteName, this.Note});
+}
+
+class NoteManager {
+  int count = 0;
+  List<note> notes = [];
+
+  void addNote(note newNote) {
+    notes.add(newNote);
+    count = count + 1;
+  }
+
+  void viewNotes() {
+    int b = 0;
+    for (note a in notes) {
+      print('${++b} - ${a.NoteName ?? "Unnamed Note"}');
+    }
+  }
+
+  void printNoteAt(int index) {
+    if (index >= 0 && index < notes.length) {
+      print('Title: ${notes[index].NoteName}');
+      print('Content: ${notes[index].Note}');
+    }
+  }
+
+  void removeNoteAt(int index) {
+    if (index >= 0 && index < notes.length) {
+      notes.removeAt(index);
+      count = notes.length;
+    }
+  }
+
+  void updateNoteAt(int index, String? newNoteName, String? newNoteContent) {
+    if (index >= 0 && index < notes.length) {
+      notes[index].NoteName = newNoteName;
+      notes[index].Note = newNoteContent;
+    }
+  }
+}
+
 class NoteApp {
-  // TODO: Complete the run function
   void run() {
-    print('Hello, world!');
+    NoteManager noteManager = NoteManager();
+
+    while (true) {
+      try {
+        print("Choose an option:");
+        print("1. Add a new note");
+        print("2. View notes");
+        print("3. View a note");
+        print("4. Update a note");
+        print("5. Remove a note");
+        print("6. Exit");
+
+        String? choice = stdin.readLineSync();
+
+        switch (choice) {
+          case '1':
+            print("Enter note name:");
+            String? noteName = stdin.readLineSync();
+            print("Enter note content:");
+            String? noteContent = stdin.readLineSync();
+
+            noteManager.addNote(note(NoteName: noteName, Note: noteContent));
+            print("Note added successfully.");
+            break;
+
+          case '2':
+            print("Notes:");
+            noteManager.viewNotes();
+            break;
+
+          case '3':
+            print("Enter the index of the note to read:");
+            String? indexStr = stdin.readLineSync();
+            int? index = int.tryParse(indexStr ?? '');
+            if (index != null && index >= 0 && index < noteManager.notes.length) {
+              noteManager.printNoteAt(index);
+            } else {
+              print("Invalid index.");
+            }
+            break;
+
+          case '4':
+            print("Enter the index of the note to update:");
+            String? indexStr = stdin.readLineSync();
+            int? index = int.tryParse(indexStr ?? '');
+
+            if (index != null && index >= 0 && index < noteManager.notes.length) {
+              print("Enter new note name:");
+              String? newNoteName = stdin.readLineSync();
+              print("Enter new note content:");
+              String? newNoteContent = stdin.readLineSync();
+
+              noteManager.updateNoteAt(index, newNoteName, newNoteContent);
+              print("Note updated successfully.");
+            } else {
+              print("Invalid index.");
+            }
+            break;
+
+          case '5':
+            print("Enter the index of the note to remove:");
+            String? indexStr = stdin.readLineSync();
+            int? index = int.tryParse(indexStr ?? '');
+
+            if (index != null && index >= 0 && index < noteManager.notes.length) {
+              noteManager.removeNoteAt(index);
+              print("Note removed successfully.");
+            } else {
+              print("Invalid index.");
+            }
+            break;
+
+          case '6':
+            return;
+
+          default:
+            print("Invalid option. Please try again.");
+            break;
+        }
+      } catch (e) {
+        print("An error occurred: $e");
+      }
+    }
   }
 }
+