// Prints calculated sum of numbers from 1 to n.
private static void PrintCalculate()
{
Console.WriteLine("Calculate the sum of numbers from 1 to n!");
// Need to define default n for use that in while loop.
int n = 0;
// while-loop for a valid positive number input.
while (n <= 0)
{
Console.Write("\nEnter a valid positive number: ");
try
{
// An exception throws if input will be non number(character etc.)
n = int.Parse(Console.ReadLine());
}
catch (FormatException e)
{
Console.WriteLine("Error: " + e.Message);
}
// Note: Overflow does not need to be taken into account.
}
// Prints calculated sums by results of methods.
Console.WriteLine("\nImplementation using a for-loop: " + SumOfNumbers.Sum_A(n));
Console.WriteLine("Implementation using a while-loop: " + SumOfNumbers.Sum_B(n));
Console.WriteLine("Implementation using LINQ: " + SumOfNumbers.Sum_C(n));
Console.WriteLine("Implementation that runs in constant time O(1): " + SumOfNumbers.Sum_D(n));
}
public static void PrintInAscendingOrder()
{
SumOfNumbers.Sum_A(5);
Console.WriteLine("Numbers from 1 to 100, in ascending order:");
for (int i = 1; i <= 100; i++)
{
Console.Write(i + "\t"); //beautifying
}
}
