Explanation of the Aggregate algorithm in LINQ (C#)

Hi everyone! I started learning LINQ in C# and came across the Aggregate method. I read the documentation, but I still don't fully understand how it works. The documentation says that Aggregate applies an accumulator function to a sequence. But what does that mean in practice? For example, I have this code: ```csharp int[] numbers = { 1, 2, 3, 4, 5 }; int sum = numbers.Aggregate((acc, x) => acc + x); Console.WriteLine(sum); // 15 ``` I understand that this is the sum of the array elements. But how exactly does this happen step by step? What are `acc` and `x` at each iteration? Why is the result 15 and not something else? I also tried this example with strings: ```csharp string[] words = { "Hello", " ", "World", "!" }; string result = words.Aggregate((current, next) => current + next); ```