using System; namespace Program { class Program { static void Main(string[] args) { int i, num, sum = 0; Console.Write("Enter the Nth number: "); num = Convert.ToInt16(Console.ReadLine()); for (i = 0; i <= num; i++) { sum = sum + i; } Console.WriteLine("\nSum of N numbers: " + sum); Console.ReadLine(); } } }
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