The data types of c# are divided into several categories

C# provides a variety of data types, classified as follows: value types: basic types (integers, floating point numbers, booleans, char), structures, enumeration reference types: classes, interfaces, delegates, arrays, String Nullable types: Value types that allow null Other types: Dynamic types, anonymous types, pointers The choice of data type should be based on the type of value stored and application requirements.

C# Data type classification

C# The language provides a series of data types to represent different types of variables and values. . These data types can be divided into the following categories:

1. Value type

• ##Basic types: Integer (int, uint , long, ulong), floating point number (float, double, decimal), Boolean (bool), char type
• Structure: Custom type, contains a set of related data members
• Enumeration: A collection of named constants, representing a set of related values

2. Reference type

• Class: Custom type, including data members and methods
• Interface: Define a set of methods and properties to implement specific functions
• Delegate: A reference type that represents a method
• Array: A collection that stores values ​​of the same data type
• String: Immutable character sequence

3. Nullable type

is used to represent value types that allow null (For example, int?, double?)

4. Other types

• Dynamic types: At runtime, the The compiler infers its type
• Anonymous type: A temporary type that exists only in a specific context
• Pointer: Used to access a memory address

Data type selection

The choice of which data type to use depends on the type of value being stored and the needs of the application. For example:

If you need to store integers, use int or long types.
• If you need to store floating point numbers, use the float or double type.
• If you need to store Boolean values, use the bool type.
• If you need to store characters, use the char type.

By choosing appropriate data types, you can optimize code performance, memory usage, and code readability.

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