//task 1
    Console.WriteLine('b');
    
    Console.Write("i am ");
    Console.Write(19);
    Console.Write(" years old");
    
    Console.WriteLine(0.25F);
    Console.WriteLine(2.625F);
    Console.WriteLine(12.39816m);
    
    Console.WriteLine(true);
    Console.WriteLine(false);
    
    
    //task 2
    string firstName;
    firstName = "Bob";
    Console.WriteLine(firstName);
    
    //task 3
    var message = "Hello World";
    Console.WriteLine(message);
    
    /////////////////////////
    ///     Challange     ///
    /////////////////////////
    
    string firstName = "Bob";
    int messageNumber = 3;
    float tempereture = 34.4F;
    
    if (firstName == "Bob")
    {
        Console.Write("Hello, ");
        Console.Write(firstName);
        Console.Write(" you have ");
        Console.Write(messageNumber);
        Console.Write(" messages in your inbox. The temperature is ");
        Console.Write(tempereture);
        Console.Write(" Celsius");
    }
    else
    {
        Console.WriteLine("Hello, stranger!");
    }