Assignments Partially Completed

session_1/solution/courses.dart

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+// Importing dart:io and our electives classes from electives.dart
+import 'dart:io';
+import 'coursesModule/electives.dart';
+
+// Main Function
+void main(){
+
+  bool running = true;                                            //Condition for loop to run
+
+  while(running){
+
+    print("\nEnter type of user  1.Admin  2.Student  3.Exit");    //User input for user type
+    String choice = stdin.readLineSync()!;
+
+
+    if(choice == "2"){
+      print("\nEnter Branch and year (eg. cs 2):");
+      List details = stdin.readLineSync()!.split(" ");                // If student, user can type branch and year 
+                                                                      //to get its branch and open electives
+
+      print("Your Branch Electives: ${BranchElectives.getList(details)}");      // Calling static getList functions of branch
+      print("Open Electives: ${OpenElectives.getList()}");                      // and open electives
+
+    }
+
+
+    else if(choice == "1"){
+      bool adminLoopRunning = true;
+      while(adminLoopRunning){                                                            // Running an admin loop
+
+        print("\nEnter type of Elective  1.Branch Elective  2.Open Elective  3.Exit");          // Enter choice for elective type
+        String electiveChoice = stdin.readLineSync()!;
+
+        if(electiveChoice == "1"){
+          print("\nEnter Operation Choice  1.View Courses  2.Add Course");              // Enter choice for operation to perform on
+          String operationChoice = stdin.readLineSync()!;                               // branch elective
+
+          if(operationChoice == "1") print("Branch Electives: ${BranchElectives.getFullList()}");  // Calling function to print all branch electives
+
+          else if(operationChoice == "2") {
+            print("\nEnter new Course details (eg. courseName courseCode branch year):");    // To add a new course
+            String courseDetails = stdin.readLineSync()!;
+            BranchElectives.addCourse(courseDetails);
+          }
+        }
+
+        else if(electiveChoice == "2"){
+          print("\nEnter Operation Choice  1.View Courses  2.Add Course");              // Enter choice for operation to perform on
+          String operationChoice = stdin.readLineSync()!;                               // open elective
+
+          if(operationChoice == "1") print("Open Electives: ${OpenElectives.getList()}"); // print all open electives
+
+          else if(operationChoice == "2") {
+            print("\nEnter new Course details (eg. courseName courseCode):");
+            String courseDetails = stdin.readLineSync()!;                             // To add a new course
+            OpenElectives.addCourse(courseDetails);
+          }
+        }
+
+        else if(electiveChoice == "3") adminLoopRunning = false;                  // end admin loop
+        else print("\nInvalid Choice\n");                                         // input error handling
+      }
+    }
+
+    else if(choice == "3") running = false;                                       // ending program loop
+    else print("\nInvalid Choice\n");                                           // input error handling
+  }
+
+}

session_1/solution/coursesModule/branchElectives.txt

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+OOPS,cs200,cs,2
+SigPrsc,ec209,ec,2
+MicroControllers,ec301,ec,3
+C++,cs102,cs,1
+EngMech,me101,me,1
+EngDraw,cv111,cv,1

session_1/solution/coursesModule/electives.dart

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+//Importing dart:io for file handling
+import 'dart:io';
+
+// Defining an abstract class electives to define basic functionalities of an elective class
+abstract class Electives{
+  abstract String courseName;
+  abstract String courseCode;
+
+}
+
+// Defining our Branch Electives Class
+class BranchElectives extends Electives{
+
+  var courseName, courseCode, branch, year;
+
+  BranchElectives(this.courseName, this.courseCode, this.branch, this.year);     // Constructor
+
+  static List getList(List details){    // To get list of branch electives corresponding to given branch and year
+
+    File file = File('./coursesModule/branchElectives.txt');      // Read our Branch electives list from branchElectives.txt
+    List lines = file.readAsLinesSync();
+
+    List line = [];
+    lines.forEach((element) => line.add(element.split(",")));      // Converting to list
+
+    List courses = [];
+    line.forEach((element) {
+      if(details[0] == element[2] && details[1] == element[3]){     //Conditions to check
+        courses.add(element[0]);
+      }
+      });
+
+    return courses; 
+  }
+
+
+    static List getFullList(){                 // To get list of all branch electives
+
+    File file = File('./coursesModule/branchElectives.txt');        // Read our Branch electives list from branchElectives.txt
+    List lines = file.readAsLinesSync();
+
+    List line = [];
+    lines.forEach((element) => line.add(element.split(",")));       // Converting to list
+
+    List courses = [];
+    line.forEach((element)=>courses.add(element[0]));               // Formatting for return
+
+    return courses;
+  }
+
+  static void addCourse(String courseDetails){                  //  To add a course to branch elective list
+
+    String insert = courseDetails.replaceAll(" ", ",");        // Formatting
+
+    File file = File('./coursesModule/branchElectives.txt');
+    file.writeAsStringSync("\n$insert",mode: FileMode.append);     // Append new course to branchElectives.txt
+    print('\nCourse added.\n');
+  }
+}
+
+
+
+
+class OpenElectives extends Electives{
+
+  var courseName, courseCode;
+
+  OpenElectives(this.courseName, this.courseCode);    // Constructor
+
+  static List getList(){                                // To get list of Open electives
+
+    File file = File('./coursesModule/openElectives.txt');
+    List lines = file.readAsLinesSync();                              // Read our Open electives list from openElectives.txt
+
+    List line = [];
+    lines.forEach((element) => line.add(element.split(",")));         // Converting to list
+
+    List courses = [];
+    line.forEach((element)=>courses.add(element[0]));
+
+    return courses;
+  }
+
+    static void addCourse(String courseDetails){                 // Add new course to list
+
+    String insert = courseDetails.replaceAll(" ", ",");              // Formatting
+
+    File file = File('./coursesModule/openElectives.txt');
+    file.writeAsStringSync("\n$insert",mode: FileMode.append);      // Append new course to openElectives.txt
+    print('\nCourse added.\n');
+  }
+}

session_1/solution/coursesModule/openElectives.txt

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+Python,py101
+CAD,me100
+FuelTechnology,cy203
+AppDev,cs215
+Ruby,rb101

session_1/solution/fibonacci.dart

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+// Importing dart:io to implement input from user
+import 'dart:io';
+
+// Recursive Function to print Fibonacci Sequence
+void printFib(int n, int a, int b){
+  if (n == 0){
+    return;
+  }
+  int c = a+b;
+  stdout.write("$c ");
+  printFib(n-1,b,c);
+}
+
+// Main Function
+void main(){
+
+  print("\n\n\n################################");
+
+  print("PRINTING FIBONACCI SEQUENCE");
+
+  print("################################\n\n\n");
+
+  stdout.write("Enter number of terms of Fibonacci numbers to print: ");
+  int? n = int.parse(stdin.readLineSync()!);   // Taking input from user
+
+  int a = 0;
+  int b = 1;
+
+  stdout.write("\n  Fibonacci series upto $n terms: ");
+
+  if(n < 1) print("\nInvalid Input");
+  else if (n == 1) stdout.write("$a ");     // Base cases
+  else if (n == 2) stdout.write("$a $b ");     // Base cases
+  else {
+    stdout.write("$a $b ");
+    printFib(n-2,a,b);     //Calling the printFib function 
+  }
+  print("\n\n##################################\n\n\n");
+}

session_1/solution/semiPrime.dart

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+// Importing packages dart:io for user input and dart:math for the sqrt() function
+import 'dart:io';
+import 'dart:math';
+
+// Defining an isSemiPrime function to check if passed number is semiprime.
+bool isSemiPrime(int n){
+
+  int countFact = 0, j = 0;
+  for(int i = 1; i<= sqrt(n); i++){            // Basically this loop counts the no. of factors of n, before sqrt(n).
+    if(n%i == 0){                              // If this count equals 2, we conclude that the number is semiprime.
+      countFact++;                             // This is because a semiprime n has 4 factors (1, prime#1, prime#2, and n)
+      j = i;                                   // out of which 1 and prime#1 are before sqrt(n), Thus count being 2.
+    }                                          // Exception, this algorithm does not work for cubes of primes.
+  }                                            
+
+  return countFact == 2 && n != pow(j, 3)? true : false;        
+
+}
+
+// Main Function
+void main(){
+
+  print("\n\n\n###############################################");
+  print("Checking if Input Number is Semiprime");
+  print("###############################################\n\n\n");
+
+  stdout.write("Enter number to check if semiprime: ");
+  int? n = int.parse(stdin.readLineSync()!);   // Taking input from user
+
+  if(isSemiPrime(n)) print("\n$n is semi prime.");
+  else print("\n$n is not semi prime.");
+
+  print("\n\n#########################################\n\n\n");
+}

session_1/solution/sumOfPrime.dart

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+// Importing dart:io to implement input from user
+import 'dart:io';
+
+
+// isPrime function to check if a number is prime
+bool isPrime(n){
+
+  int count = 0;
+  if(n == 1){
+    count = 1;
+  }else{
+    for(int i = 2; i*i <= n; i++){
+      if (n % i == 0){
+        count++;
+      }
+    }
+  }
+  return count == 0 ? true : false;
+}
+
+
+// Main Function
+void main(){
+
+  print("\n\n\n##########################################################");
+  print("Checking if Sum of primes of array is also Prime");
+  print("##########################################################\n\n\n");
+
+  stdout.write("Enter array to check (eg. 1 4 3 55 3): ");
+  String? n = stdin.readLineSync();   // Taking input from user
+
+  if(n != null){
+    var list = n.split(" ");
+    List<int> arr = [];                                                       // Convert user input into array/list data 
+    list.forEach((element) => {arr.add(int.parse(element))});
+
+
+    int sum = 0;
+    arr.forEach((element) => {sum += isPrime(element) ? element : 0});        //get sum of prime elements of list
+
+    if(isPrime(sum)) print("\nSum of the primes of the array ($sum) is also prime");      // Output if sum of prime elements 
+    else print("\nSum of the primes of the array ($sum) is not prime");                   // of array is prime or not
+
+
+
+
+  }else print("Null input not accepted");
+
+
+
+
+  print("\n\n#############################################################\n\n\n");
+
+}

session_3/numbers_app/.gitignore

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+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

session_3/numbers_app/.metadata

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+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 77d935af4db863f6abd0b9c31c7e6df2a13de57b
+  channel: stable
+
+project_type: app

session_3/numbers_app/README.md

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+# numbers_app
+
+A new Flutter project.
+
+## Final Result
+
+![numbers app](https://user-images.githubusercontent.com/78261857/150091389-cb6da685-15c5-432e-a65b-94e63ff95092.gif)
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://flutter.dev/docs/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://flutter.dev/docs/cookbook)
+
+For help getting started with Flutter, view our
+[online documentation](https://flutter.dev/docs), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.