Appendix: Exercise Solutions

There are no exercises in Chapters 1, 2, 18, and 19.


Exercise 1


Exercise 2

b), as it starts with a number, and e), as it contains a full stop.

Exercise 3

No, there is no theoretical limit to the size of a string that may be contained in a string variable.

Exercise 4

The * and / operators have the highest precedence here, followed by %, +, and finally +=. The precedence in the exercise can be illustrated using parentheses as follows:

resultVar += (var1 * var2) + ((var3 % var4) / var5);

Exercise 5

using static System.Console;
using static System.Convert; 
static void Main(string[] args)
   int firstNumber, secondNumber, thirdNumber, fourthNumber;
   WriteLine("Give me a number:");
   firstNumber = ToInt32(ReadLine());
   WriteLine("Give me another number:");
   secondNumber = ToInt32(Console.ReadLine());
   WriteLine("Give me another number:");
   thirdNumber = ToInt32(ReadLine());
   WriteLine("Give me another number:");
   fourthNumber = ToInt32(ReadLine());
   WriteLine($"The product of {firstNumber}, {secondNumber}, " +
           $"{thirdNumber}, and {fourthNumber} is " +
           $"{firstNumber * secondNumber * thirdNumber * fourthNumber}.");

Note that Convert.ToInt32() is used here, which isn't covered in the chapter.


Exercise 1

(var1 > 10) ^ (var2 > 10)

Exercise 2

Note that at least one number must be >10 for the messages to be consistent with the entered scenario. Also, consider checking whether ...

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