// Creating an array with predefined values
int[] numbers = { 10, 20, 30 };

// Creating an empty array and assigning values later
int[] grades = new int[3];
grades[0] = 85;
grades[1] = 90;
grades[2] = 78;

int[] numbers = { 10, 20, 30 };

// Accessing elements by index
Console.WriteLine(numbers[0]); // Output: 10

// Iterating through the array
foreach (var num in numbers)
{
    Console.WriteLine(num);
}

int[] numbers = { 10, 20, 30 };

// Updating the value at index 1
numbers[1] = 25;

foreach (var num in numbers)
{
    Console.WriteLine(num);
}
// Output: 10, 25, 30