Massivlar va to'plamlar

int[] ballar = [85, 92, 78, 95, 88];

Console.WriteLine($"Elementlar soni: {ballar.Length}");
Console.WriteLine($"Birinchi: {ballar[0]}, oxirgi: {ballar[^1]}");
Console.WriteLine($"Yig'indi: {ballar.Sum()}");
Console.WriteLine($"Eng yuqori: {ballar.Max()}");
Console.WriteLine($"O'rtacha: {ballar.Average()}");

int[] a = [1, 2, 3];                   // to'plam ifodasi (C# 12)
int[] b = { 1, 2, 3 };                 // eski yozuv
int[] c = new int[3];                  // uchta nol bilan to'ldirilgan
int[] d = new int[] { 1, 2, 3 };       // to'liq yozuv

Console.WriteLine($"a: [{string.Join(",", a)}]");
Console.WriteLine($"c: [{string.Join(",", c)}]  - sukut qiymatlari");
Console.WriteLine($"Teng-mi a va d: {a.SequenceEqual(d)}");

int[] sonlar = [5, 3, 9, 1, 7];

Array.Sort(sonlar);
Console.WriteLine($"Saralangan: {string.Join(", ", sonlar)}");

Array.Reverse(sonlar);
Console.WriteLine($"Teskari:    {string.Join(", ", sonlar)}");

int orni = Array.IndexOf(sonlar, 9);
Console.WriteLine($"9 ning o'rni: {orni}");

List<string> talabalar = ["Husanboy", "Malika"];

talabalar.Add("Nodira");
talabalar.Add("Aziza");
talabalar.Insert(0, "Kamola");
talabalar.Remove("Malika");

Console.WriteLine($"Soni: {talabalar.Count}");
Console.WriteLine(string.Join(", ", talabalar));
Console.WriteLine($"Nodira bormi: {talabalar.Contains("Nodira")}");
Console.WriteLine($"Aziza o'rni: {talabalar.IndexOf("Aziza")}");

Dictionary<string, int> aholi = new()
{
    ["Namangan"] = 626000,
    ["Andijon"] = 441000,
    ["Chust"] = 68000
};

aholi["Toshkent"] = 2900000;

Console.WriteLine($"Namangan aholisi: {aholi["Namangan"]}");
Console.WriteLine($"Shaharlar soni: {aholi.Count}");

foreach ((string shahar, int soni) in aholi)
{
    Console.WriteLine($"  {shahar,-10} {soni,9}");
}

HashSet<string> shaharlar = ["Namangan", "Andijon", "Namangan"];

Console.WriteLine($"Soni: {shaharlar.Count}");

bool qoshildi = shaharlar.Add("Andijon");
Console.WriteLine($"Andijon qayta qo'shildimi: {qoshildi}");

HashSet<string> boshqa = ["Andijon", "Buxoro"];
Console.WriteLine(
    $"Umumiy: {string.Join(", ", shaharlar.Intersect(boshqa))}");

Queue<string> navbat = new();
navbat.Enqueue("Husanboy");
navbat.Enqueue("Malika");
navbat.Enqueue("Nodira");

Console.WriteLine($"Birinchi chiqadi: {navbat.Dequeue()}");
Console.WriteLine($"Keyingi kim: {navbat.Peek()}");

Stack<string> taxlam = new();
taxlam.Push("birinchi");
taxlam.Push("ikkinchi");
taxlam.Push("uchinchi");

Console.WriteLine($"Oxirgi chiqadi: {taxlam.Pop()}");

int[,] jadval = new int[3, 4];

for (int i = 0; i < 3; i++)
{
    for (int j = 0; j < 4; j++)
    {
        jadval[i, j] = (i + 1) * (j + 1);
    }
}

for (int i = 0; i < jadval.GetLength(0); i++)
{
    for (int j = 0; j < jadval.GetLength(1); j++)
    {
        Console.Write($"{jadval[i, j],4}");
    }
    Console.WriteLine();
}

int[][] tishli =
[
    [1],
    [1, 2],
    [1, 2, 3]
];

foreach (int[] qator in tishli)
{
    Console.WriteLine($"{qator.Length} ta: {string.Join(" ", qator)}");
}