Chapter 2

1. The built-in integral types in C# are byte, sbyte, ushort, short, uint, int, ulong, and long.
2. The float and double types represent numbers using the inverse powers of 2 for the fractional part. Therefore, they cannot represent exactly numbers such as 1.23 or 19.99, but only an approximation of them. Although double has 15 digits of precision, compared to float, which has only 7; precision loss accumulates when performing repeated calculations. The decimal type uses a decimal representation of real numbers, which is much slower to compute, but provides better precision. The decimal type has 28 digits of precision and is suitable for categories of applications, such as financial applications, where this is key.
3. Strings can be concatenated using the + operator. Apart from concatenation, you can compose strings using the String.Format() static method, or with string interpolation, which is a syntactic shortcut for this method.
4. Some characters have a special meaning...