Numbers

Defaults

• A literal value with no decimal point generally defaults to an int,
• By default, when you specify a literal number with a decimal point, the compiler interprets it as a double type.

Console.WriteLine(1/3);
Console.WriteLine(1F/3);

Literal Suffix

• F: float
• D: double
• M: decimal
• L: long or ulong
• U: uint or ulong
• UL, LU: ulong

Digit Separator

• Numbers can get quite large and difficult to read. To overcome the readability problem, C# 7.0 added support for a digit separator, an underscore (_), when expressing a numeric literal
• You can use the digit separator to create whatever grouping you like as long as the underscore occurs between the first and last digits.

Console.WriteLine(9_814_072_356M);
Console.WriteLine(98_140_72_356M);

Formatting Numbers as Hexadecimal

• To display a numeric value in its hexadecimal format,

Console.WriteLine($"0x{42:X}");