Two-dimensional array

Write a program in C# that asks the user for the grades of 10 students divided into 2 groups of 5 students in each. You must store them in a two-dimensional array and show the arithmetic average of each group of students.

Input

4
5
3 
6 
3 
7 
4 
8 
3 
5 
6 
2 
6 
7 
4 
6 
7 
4 
2 
3

Output

Average for group 1 is 4,8
Average for group 2 is 4,7

Solution

using System;
public class TwoDimensionalArray
{
    public static void Main(string[] args)
    {
        int totalByGroup = 5;

        float[,] puntuations = new float[totalByGroup, totalByGroup];
        float totalGroup1 = 0.0f, totalGroup2 = 0.0f;

        // Get puntuations
        for (int i = 0; i < 2; i++)
        {
            for (int j = 0; j < totalByGroup; j++)
            {
                puntuations[i, j] = Convert.ToSingle(Console.ReadLine());
            }
        }

        // Calculate average group 1
        for (int i = 0; i < totalByGroup; i++)
        {
            totalGroup1 += puntuations[0, i];
        }
        Console.WriteLine("Average for group 1 is {0}", totalGroup1 / totalByGroup);

        // Calculate average group 2
        for (int i = 0; i < totalByGroup; i++)
        {
            totalGroup2 += puntuations[1, i];
        }
        Console.WriteLine("Average for group 2 is {0}", totalGroup2 / totalByGroup);
    }
}