IntroC#_loops_arrays_decimal_methods_recursion_1b

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HelloWorld1b
{
    class Program
    {
        static void Main(string[] args)
        {
            int age = 50;
            decimal money = 2.544234342342342342342342342342423M;
            char firstLetter = 'S'; // '\u0fff';
            bool isMail = true;

            int nextYear = (age + 1) * 8;

            bool result = 1 + 4 * 5 > 34 % 5 + 5 - 6 && 21321 % 4 - 6 <= 32423 % 6 + 4;

            string name = "Stoyan";
            object myObject = 5;
            Console.WriteLine("Hello World! And my age: " + age);
            Console.WriteLine("I have : " + money);
            Console.WriteLine("The first letter of my name is : " + firstLetter);
            Console.WriteLine(isMail);
            Console.WriteLine(name);
            Console.WriteLine(nextYear);
            Console.WriteLine(result);

            Console.WriteLine("Please enter your age:");
            string age1 = Console.ReadLine();
            Console.WriteLine("{1}You have entered: {0} ", age1, age);

            int ageConverted = int.Parse(age1);

            if (ageConverted < 20)
            {
                Console.WriteLine("You are an teenager");
            }
            else if (ageConverted >= 20 && ageConverted < 30)
            {
                Console.WriteLine("You are in your twentees");
            }
            else {
                Console.WriteLine("I don't know what to say");
            }

            switch (ageConverted) {
                case 10:
                case 20:
                    Console.WriteLine("perfect age");
                    break;
                case 30:
                    Console.WriteLine("Very nice");
                    break;
                default :
                    Console.WriteLine("You are not 20 or 30 years old. I don't know.");
                    break;
            }

            Console.WriteLine(1);
            Console.WriteLine(2);
            Console.WriteLine(3);
            // ...

            int i = 1;
            while ( i <= 10) {
                if (i == 5) break;
                Console.WriteLine("while: {0}: ", i);
                i++;
            }

            Console.WriteLine("Please select [1-4]:");
            Console.WriteLine("1. List partitions");
            Console.WriteLine("2. Create a partiono");
            Console.WriteLine("3. Delete partition");
            Console.WriteLine("4. Exit");

            string choice = "";
            while (true) {
                choice = Console.ReadLine();
                // ... do somethign smart
                // if (choice == "4") {
                if (int.Parse(choice) == 4)
                {
                    break;
                }
            }

            i = 11;
            do {
                Console.WriteLine("do-while: {0}", i);
                i++;
            } while(i <= 10);


            for (i = 0; i < 10; i++) {
                if (i % 2 != 1) continue;
                Console.WriteLine("for {0}", i);
            }

            string[] group1b = { "Georgi", "Ivan", "Georgi", "Dimitar", "Daniel", "Maria", "Angel", "Stefan", "Dean"};

            foreach (string namestr in group1b) {
                Console.WriteLine(namestr);
            }

            for (i = 0; i < 10; i++) {
                for (int j = 0; j < i; j++) {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            /*
            int[] myArray;
            myArray = new int[5];
            myArray[4] = 45;
            */

            // 2)
            // int[] myArray = { 32, 45, 67, 890 };

            int[] myArray = new int[3] { 23, 45, 46 };

            for (i = 0; i < myArray.Length; i++) {
                Console.WriteLine("myArray[{0}] = {1}", i, myArray[i]);
            }

            string[,] positionsOfTheStudents = {
                   {"Hristo", "Georgi","","","Ivan","", "","Georgi"},
                   {"Dimitar", "Daniel","","Maria","","", "","Angel"},
                   {"Stefan", "","","Dean","","", "",""}
            };

            for (i = 0; i < positionsOfTheStudents.GetLength(0); i++)
            {
                Console.Write("Red {0}: ", i);
                for (int j = 0; j < positionsOfTheStudents.GetLength(1); j++)
                {
                    Console.Write(" {0}", positionsOfTheStudents[i, j]);
                }
                Console.WriteLine();
            }

            int[][] jaggedArray;
            jaggedArray = new int[2][];
            jaggedArray[0] = new int[8];
            jaggedArray[1] = new int[5];

            /*
            string temp = "";
            for (i = 0; i < 15; i++) {
                temp += "*";
            }
            Console.WriteLine(temp);

            temp = "";
            for (i = 0; i < 5; i++)
            {
                temp += "@";
            }
            Console.WriteLine(temp);
            */

            Console.WriteLine(createString(12));
            Console.WriteLine(createString(10));
            Console.WriteLine(createString(5));
            Console.WriteLine(createString(15, "@"));
            Console.WriteLine(createString(15, "@", "Stoyan", "Ivan", "blah blah"));
            Console.WriteLine(createString());

            Console.WriteLine("Factorial from {0} = {1}", 6, factorial(6));
            Console.WriteLine("Factorial from {0} = {1}", 6, factorialIteration(6));

            for (i = 0; i < 10; i++)
            {
                Console.WriteLine("Fibonacci {0} => {1}", i, fibonacci(i));
            }

        }

        static string createString(int strLength, string str = "*", params string[] par)
        {
            string temp = "";
            for (int i = 0; i < strLength; i++)
            {
                temp += str;
            }

            foreach (string name in par) {
                Console.WriteLine(name);
            }

            return temp;
        }

        static string createString() {
            return "Hahahaha";
        }

        /*
        static string createString(int sadh, string erwrew = "*", params string[] par)
        {
            return "Error!!!";
        }
        */

        static int factorial(int n) {
            if (n == 0) return 1;
            return factorial(n - 1) * n;
        }

        static int factorialIteration(int n)
        {
            var factorial = 1;
            for (int i = 1; i <= n; i++)
            {
                factorial *= i;
            }

            return factorial;
        }

        static int fibonacci(int n) {
            if (n <= 2) return 1;
            return fibonacci(n - 2) + fibonacci(n - 1);
        }
    }
}