Literals and Constants in C#
Literal is a source code representation of a value, i.e. it is a value that has been hard-coded directly into your source.Example
x is a variable, and 100 is a literal.
Type of literals in C# are:
- Boolean Literal
- Integer Literal
- Real Literal
- Character Literal
- String Literal
- Null Literal
There are two Boolean literal values: true and false.Example
Integer literals are used to write values of types int, uint, long, and ulong. Integer literals have two possible forms: decimal and hexadecimal.Example
Real literals are used to write values of types float, double, and decimal.Example
A character literal represents a single character, and usually consists of a character in quotes, as in 'a'.Example
C# provides support for two types of string literals: regular string literals and verbatim string literals.
Regular string literals are enclosed within double quotes, such as "string". They can contain any sequence of characters, including escape sequences like "\t" for the tab character or "\n" for a new line. Additionally, regular string literals can also include hexadecimal or Unicode escape sequences to represent specific characters.
On the other hand, verbatim string literals are denoted by an "@" character preceding the opening double-quote, such as @"string". They allow for the inclusion of escape sequences and characters without the need for special handling. This means that backslashes "" within verbatim string literals are treated as ordinary characters, and no additional escaping is required. Verbatim string literals are particularly useful when working with file paths, regular expressions, or any scenario where backslashes or escape sequences are common.Example
Null Literal is literal that denotes null type. Moreover, null can fit to any reference-type . and hence is a very good example for polymorphism.Example
Constants are values which are fixed and cannot be changed anytime during program execution. They can be of any data type.