Операторы и математика

using System;

class Program
{
    static void Main()
    {
        int a = 17, b = 5;

        Console.WriteLine($"a + b = {a + b}");
        Console.WriteLine($"a - b = {a - b}");
        Console.WriteLine($"a * b = {a * b}");
        Console.WriteLine($"a / b = {a / b}");        // int / int drops the fraction
        Console.WriteLine($"a % b = {a % b}");        // remainder
        Console.WriteLine($"a / 5.0 = {a / 5.0}");    // a double operand keeps it

        int total = 10;
        total += 5;
        total *= 2;
        Console.WriteLine($"total = {total}");

        int count = 0;
        count++;
        Console.WriteLine($"count = {count}");

        // Comparison and logical operators produce bool values.
        Console.WriteLine($"a > b: {a > b}, a == 17: {a == 17}");
        Console.WriteLine($"a > 10 && b > 10: {a > 10 && b > 10}");
        Console.WriteLine($"a > 10 || b > 10: {a > 10 || b > 10}");

        // Math holds common functions.
        Console.WriteLine($"Math.Pow(2, 10) = {Math.Pow(2, 10)}");
        Console.WriteLine($"Math.Round(3.14159, 2) = {Math.Round(3.14159, 2)}");
    }
}