using System;
namespace ConsoleApp2
{
internal class Program
{
private static void Main(string[] args)
{
var inputX = double.Parse(Console.ReadLine());
double y;
if (inputX <= 0)
{
y = Math.Abs(inputX) + 3;
}
else if (inputX > 0 && inputX < 1)
{
y = 1 + Math.Pow(inputX, 2);
}
else
{
y = 2 * inputX + Math.Sqrt(inputX);
}
Console.WriteLine($"y = {y:0.00}");
Console.ReadKey();
}
}
}
using System;
namespace ConsoleApp2
{
internal class Program
{
private static void Main(string[] args)
{
var inputChar = Console.ReadKey().KeyChar;
Console.WriteLine();
if (char.IsLower(inputChar))
{
Console.WriteLine(char.ToUpper(inputChar));
}
else if (char.IsUpper(inputChar))
{
Console.WriteLine(char.ToLower(inputChar));
}
else
{
Console.WriteLine(inputChar);
}
Console.ReadKey();
}
}
}