I am training in C# and we are in the Flow control looping and I am quite rusty in Math. I was given 2 problems and I am having doubts on the solutions.

∑ 5 = 1+ 2 + 3 + 4 + 5

Is this correct?

{ int input;

int som = 0;

Console.Write(“Enter a natural number: “);

input = Int32.Parse(Console.ReadLine());

for (int i = 1; i <= input ; i++)

{

som += i;

}

Console.WriteLine(“The sum is ” + som);

Console.ReadKey();

}