From 6898929210deb87486fe995375ce3f4ca121b5dd Mon Sep 17 00:00:00 2001
From: pascalchibuikem <125016293+pascalchibuikem@users.noreply.github.com>
Date: Mon, 12 Feb 2024 15:03:01 +0100
Subject: [PATCH] exam3 from Pascal Chibukem

---
 exam3/exam3/.gitignore            |   3 +
 exam3/exam3/CHANGELOG.md          |   3 +
 exam3/exam3/README.md             |   2 +
 exam3/exam3/analysis_options.yaml |  30 +++
 exam3/exam3/bin/exam3.dart        | 172 ++++++++++++++
 exam3/exam3/lib/exam3.dart        |   3 +
 exam3/exam3/pubspec.lock          | 381 ++++++++++++++++++++++++++++++
 exam3/exam3/pubspec.yaml          |  15 ++
 exam3/exam3/test/exam3_test.dart  |   8 +
 9 files changed, 617 insertions(+)
 create mode 100644 exam3/exam3/.gitignore
 create mode 100644 exam3/exam3/CHANGELOG.md
 create mode 100644 exam3/exam3/README.md
 create mode 100644 exam3/exam3/analysis_options.yaml
 create mode 100644 exam3/exam3/bin/exam3.dart
 create mode 100644 exam3/exam3/lib/exam3.dart
 create mode 100644 exam3/exam3/pubspec.lock
 create mode 100644 exam3/exam3/pubspec.yaml
 create mode 100644 exam3/exam3/test/exam3_test.dart

diff --git a/exam3/exam3/.gitignore b/exam3/exam3/.gitignore
new file mode 100644
index 0000000..3a85790
--- /dev/null
+++ b/exam3/exam3/.gitignore
@@ -0,0 +1,3 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/
diff --git a/exam3/exam3/CHANGELOG.md b/exam3/exam3/CHANGELOG.md
new file mode 100644
index 0000000..effe43c
--- /dev/null
+++ b/exam3/exam3/CHANGELOG.md
@@ -0,0 +1,3 @@
+## 1.0.0
+
+- Initial version.
diff --git a/exam3/exam3/README.md b/exam3/exam3/README.md
new file mode 100644
index 0000000..3816eca
--- /dev/null
+++ b/exam3/exam3/README.md
@@ -0,0 +1,2 @@
+A sample command-line application with an entrypoint in `bin/`, library code
+in `lib/`, and example unit test in `test/`.
diff --git a/exam3/exam3/analysis_options.yaml b/exam3/exam3/analysis_options.yaml
new file mode 100644
index 0000000..dee8927
--- /dev/null
+++ b/exam3/exam3/analysis_options.yaml
@@ -0,0 +1,30 @@
+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+# linter:
+#   rules:
+#     - camel_case_types
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options
diff --git a/exam3/exam3/bin/exam3.dart b/exam3/exam3/bin/exam3.dart
new file mode 100644
index 0000000..d03e26a
--- /dev/null
+++ b/exam3/exam3/bin/exam3.dart
@@ -0,0 +1,172 @@
+import 'package:exam3/exam3.dart' as exam3;
+
+void main() async {
+  print(addInt(3, 5));
+
+//calling un named function in 4b
+  print(multiply(4, 5)); // Output: 20
+
+  // 7
+  greet('Alice', 30);
+  //b
+  greet2(name2: 'Alice', age2: 30);
+
+  //9
+  greeting(name: 'Alice');
+
+  //10
+  greets('Bob', 'Hello');
+
+  //11
+  printMessage('Hello, World!');
+
+  //12
+  outerFunction();
+
+  //13
+  // Define a function to add two numbers
+  int add(int a, int b) {
+    return a + b;
+  }
+
+  // Pass the 'add' function as a parameter to the higher-order function
+  higherOrderFunction(3, 5, add); // Output: 8
+
+  //15
+  greet3('Alice'); // Output: Hello, Alice!
+  greet3('');
+
+  //17
+  print('Starting...');
+  myAsyncFunction(); // Calling the asynchronous function
+  print('Continuing with other tasks...');
+
+  //18
+  print('Fetching data...');
+
+  // Call the asynchronous function and wait for the result
+  int result = await fetchData();
+
+  print('Data fetched: $result');
+
+  //19
+  //myFunction();
+}
+
+//1. function in dart just like every other programming language is a block of re
+//reusable code meant to perform a particular task, as shown below.
+// Named function
+int addInt(int a, int b) {
+  return a + b;
+}
+
+//2. function is declared by specifying the return type and the the fn name,
+// a closed brackets for the parameter if required and curly brackets for body.
+int name(parameters) {
+  return parameters;
+}
+//3. main()fn is where execution of programme start without it, programme can not run.
+
+//4. different between named and un-named function
+int subtract(int a, int b) {
+  //named function
+  return a - b;
+}
+
+var multiply = (int a, int b) {
+  //un-named function which can be called anywhere
+  return a * b;
+};
+// calling un named fn
+
+//5.return type refers to the data type a fn will return after execution.
+
+double myProducts(int a, int b) {
+  // Function body
+  // Optionally, return a value of returnType
+  return (2.7 * 8.1);
+}
+
+//6. parameter is passed by including it in the parenthesis after fn name
+String fullName(String firstName, surName) {
+  return fullName(firstName, surName);
+}
+
+//7. positional parameter
+void greet(String name, int age) {
+  print('Hello, $name! You are $age years old.');
+}
+
+//named parameter
+void greet2({String? name2, int? age2}) {
+  print('Hello, $name2 You are $age2 years old.');
+}
+
+//8 arrow is used to write fn with single expression as shown below
+int square(int x) => x * x;
+
+//9 how default parameter is used
+void greeting({String name = 'World'}) {
+  print('Hello, $name!');
+}
+
+//10 optional parameter
+void greets(String name, [String prefix = 'Hello']) {
+  print('$prefix, $name!');
+}
+
+//11 void used to indicate function with no return, rather void functions.
+void printMessage(String message) {
+  print(message);
+}
+
+//12 nested function
+void outerFunction() {
+  print('Outer function');
+
+  void innerFunction() {
+    print('Inner function');
+  }
+
+  innerFunction();
+}
+
+//13 higher order function
+void higherOrderFunction(int x, int y, Function(int, int) operation) {
+  print(operation(x, y));
+}
+
+//15 how to use return key word in dart
+// Function definition
+void greet3(String name) {
+  if (name.isEmpty) {
+    print('Name is empty, cannot proceed.');
+    return; // Exit the function early
+  }
+  print('Hello, $name!');
+}
+
+//16 function signature, ma
+int add(int a, int b) {
+  return a + b;
+}
+
+//17  making function in dart asynchronous
+Future<void> myAsyncFunction() async {
+  // Asynchronous code that might take time to execute
+  await Future.delayed(Duration(seconds: 1));
+  print('Async operation complete');
+}
+
+//18 use of async , await and future
+// Asynchronous function that simulates fetching data from an API
+Future<int> fetchData() async {
+  // Simulate a delay of 2 seconds (asynchronous operation)
+  await Future.delayed(Duration(seconds: 2));
+
+  // Return a value after the delay
+  return 42;
+}
+
+//19 calling function defined in other dart file involves importing the file into the file in which you want call it,
+// and then call it as i did in the main method.
\ No newline at end of file
diff --git a/exam3/exam3/lib/exam3.dart b/exam3/exam3/lib/exam3.dart
new file mode 100644
index 0000000..f64ad72
--- /dev/null
+++ b/exam3/exam3/lib/exam3.dart
@@ -0,0 +1,3 @@
+int calculate() {
+  return 6 * 7;
+}
diff --git a/exam3/exam3/pubspec.lock b/exam3/exam3/pubspec.lock
new file mode 100644
index 0000000..aecc7d1
--- /dev/null
+++ b/exam3/exam3/pubspec.lock
@@ -0,0 +1,381 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: "0b2f2bd91ba804e53a61d757b986f89f1f9eaed5b11e4b2f5a2468d86d6c9fc7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "67.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "37577842a27e4338429a1cbc32679d508836510b056f1eedf0c8d20e39c1383d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.4.1"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.11.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.18.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "8acabb8306b57a409bf4c83522065672ee13179297a6bb0cb9ead73948df7c76"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.7.2"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: "408e3ca148b31c20282ad6f37ebfa6f4bdc8fede5b74bc2f08d9d92b55db3612"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: "0e7014b3b7d4dac1ca4d6114f82bf1782ee86745b9b42a92c9289c23d8a0ab63"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: "97486f20f9c2f7be8f514851703d0119c3596d14ea63227af6f7a481ef2b2f8b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: "2ec25704aba361659e10e3e5f5d672068d332fc8ac516421d483a11e5cbd061e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: "4186c61b32f99e60f011f7160e32c89a758ae9b1d0c6d28e2c02ef0382300e2b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
+  lints:
+    dependency: "direct dev"
+    description:
+      name: lints
+      sha256: "0a217c6c989d21039f1498c3ed9f3ed71b354e69873f13a8dfc3c9fe76f1b452"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.16+1"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "7687075e408b093f36e6bbf6c91878cc0d4cd10f409506f7bc996f68220b9136"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "2e123074287cc9fd6c09de8336dae606d1ddb88d9ac47358826db698c176a1f2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: "1c5b77ccc91e4823a5af61ee74e6b972db1ef98c2ff5a18d3161c982a55448bd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.0"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "20fe868b6314b322ea036ba325e6fc0711a22948856475e2c2b6306e8ab39c2a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.1"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "40d3ab1bbd474c4c2328c91e3a7df8c6dd629b79ece4c4bd04bee496a224fb0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: ad29c505aee705f41a4d8963641f91ac4cee3c8fad5947e033390a7bd8180fa4
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: a41d3f53c4adf0f57480578c1d61d90342cd617de7fc8077b1304643c2d85c1e
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.4"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: "84cf769ad83aa6bb61e0aa5a18e53aea683395f196a6f39c4c881fb90ed4f7ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "708b3f6b97248e5781f493b765c3337db11c5d2c81c3094f10904bfa8004c703"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.12"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test:
+    dependency: "direct dev"
+    description:
+      name: test
+      sha256: "7ee446762c2c50b3bd4ea96fe13ffac69919352bd3b4b17bac3f3465edc58073"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.25.2"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "9955ae474176f7ac8ee4e989dadfb411a58c30415bcfb648fa04b2b8a03afa7f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.0"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "2bc4b4ecddd75309300d8096f781c0e3280ca1ef85beda558d33fcbedc2eead4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: a2662fb1f114f4296cf3f5a50786a2d888268d7776cf681aa17d660ffa23b246
+      url: "https://pub.dev"
+    source: hosted
+    version: "14.0.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "3d2ad6751b3c16cf07c7fca317a1413b3f26530319181b37e3b9039b84fc01d8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "4188706108906f002b3a293509234588823c8c979dc83304e229ff400c996b05"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.2"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: "939ab60734a4f8fa95feacb55804fa278de28bdeef38e616dc08e44a84adea23"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: "75769501ea3489fca56601ff33454fe45507ea3bfb014161abc3b43ae25989d5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+sdks:
+  dart: ">=3.2.1 <4.0.0"
diff --git a/exam3/exam3/pubspec.yaml b/exam3/exam3/pubspec.yaml
new file mode 100644
index 0000000..1b91653
--- /dev/null
+++ b/exam3/exam3/pubspec.yaml
@@ -0,0 +1,15 @@
+name: exam3
+description: A sample command-line application.
+version: 1.0.0
+# repository: https://github.com/my_org/my_repo
+
+environment:
+  sdk: ^3.2.1
+
+# Add regular dependencies here.
+dependencies:
+  # path: ^1.8.0
+
+dev_dependencies:
+  lints: ^2.1.0
+  test: ^1.24.0
diff --git a/exam3/exam3/test/exam3_test.dart b/exam3/exam3/test/exam3_test.dart
new file mode 100644
index 0000000..8d426b4
--- /dev/null
+++ b/exam3/exam3/test/exam3_test.dart
@@ -0,0 +1,8 @@
+import 'package:exam3/exam3.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('calculate', () {
+    expect(calculate(), 42);
+  });
+}