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Write a C# Sharp program to get the nth tetrahedral number from a given integer(n) value

hamza
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2022-05-18
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 Write a C# Sharp program to get the nth tetrahedral number from a given integer(n) value. 
A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron. The formula for the nth tetrahedral number is represented by the 3rd rising factorial of n divided by the factorial of 3:
C# Sharp Exercises: Get the nth tetrahedral number from a given integer(n) value.
Example of tetrahedral numbers:

N Tetrahedral
Number
1 1
2 4
3 10
4 20
5 35
6 56


Expected Output:
Original Number:1
Tetrahedral number:1
Original Number:2
Tetrahedral number:4
Original Number:6
Tetrahedral number:56

c# programming, Programming,
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hamza
2022-05-18
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using System;
using System.Linq;
namespace exercises
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 1;
            Console.WriteLine("\nOriginal Number:" + n);
            Console.WriteLine("Tetrahedral number:" + test(n));
            n = 2;
            Console.WriteLine("\nOriginal Number:" + n);
            Console.WriteLine("Tetrahedral number:" + test(n));
            n = 6;
            Console.WriteLine("\nOriginal Number:" + n);
            Console.WriteLine("Tetrahedral number:" + test(n));
        }
        public static int test(int n)
        {
            return n * (n + 1) * (n + 2) / 6;
        }
    }
}

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