Arrays

An array holds a fixed number of same-typed values: int[] numbers = {1, 2, 3, 4, 5};.

Example: foreach over an array

using System;

class Program {
    static void Main() {
        int[] numbers = {1, 2, 3, 4, 5};
        int total = 0;
        foreach (int n in numbers) {
            total += n;
        }
        Console.WriteLine($"Total: {total}");
    }
}

Total: 15

foreach (int n in numbers) steps through each value in turn without needing a manual index, prefer it over a plain for loop whenever you don't specifically need the index itself. Get the count with numbers.Length (a property, no parentheses) if you do need to know the size.