cs11dotnet7/vscode/Chapter02/Arrays/Program.cs

string[] names; // can reference any size array of strings

// allocating memory for four strings in an array
names = new string[4];

// storing items at index positions
names[0] = "Kate";
names[1] = "Jack";
names[2] = "Rebecca";
names[3] = "Tom";

string[] names2 = new[] { "Kate", "Jack", "Rebecca", "Tom" };

// looping through the names
for (int i = 0; i < names2.Length; i++)
{
  // output the item at index position i
  Console.WriteLine(names2[i]);
}

string[,] grid1 = new[,] // two dimensions
{
  { "Alpha", "Beta", "Gamma", "Delta" },
  { "Anne", "Ben", "Charlie", "Doug" },
  { "Aardvark", "Bear", "Cat", "Dog" }
};

Console.WriteLine($"Lower bound of the first dimension is: {grid1.GetLowerBound(0)}");
Console.WriteLine($"Upper bound of the first dimension is: {grid1.GetUpperBound(0)}");
Console.WriteLine($"Lower bound of the second dimension is: {grid1.GetLowerBound(1)}");
Console.WriteLine($"Upper bound of the second dimension is: {grid1.GetUpperBound(1)}");

for (int row = 0; row <= grid1.GetUpperBound(0); row++)
{
  for (int col = 0; col <= grid1.GetUpperBound(1); col++)
  {
    Console.WriteLine($"Row {row}, Column {col}: {grid1[row, col]}");
  }
}

// alternative syntax
string[,] grid2 = new string[3,4]; // allocate memory
grid2[0, 0] = "Alpha"; // assign string values
// and so on
grid2[2, 3] = "Dog";

string[][] jagged = new[] // array of string arrays
{
  new[] { "Alpha", "Beta", "Gamma" },
  new[] { "Anne", "Ben", "Charlie", "Doug" },
  new[] { "Aardvark", "Bear" }
};

Console.WriteLine("Upper bound of array of arrays is: {0}",
  jagged.GetUpperBound(0));

for (int array = 0; array <= jagged.GetUpperBound(0); array++)
{
  Console.WriteLine("Upper bound of array {0} is: {1}",
    arg0: array,
    arg1: jagged[array].GetUpperBound(0));
}

for (int row = 0; row <= jagged.GetUpperBound(0); row++)
{
  for (int col = 0; col <= jagged[row].GetUpperBound(0); col++)
  {
    Console.WriteLine($"Row {row}, Column {col}: {jagged[row][col]}");
  }
}