What are the commonly used basic data types?

Commonly used basic data types include integer, floating point, Boolean, character, string, null, enumeration, structure, union and pointer. Detailed introduction: 1. Integer type, used to store integer values, signed and unsigned; 2. Floating point type, used to store values ​​with decimal parts, divided into two types: single precision and double precision; 3 , Boolean type, used to store logical values, that is, true or false; 4. Character type, used to store single characters or letters; 5. String type, used to store text data or character sequences; 6. Empty value or null, means There is no value and so on.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

In computer science and programming, there are many common basic data types that are used to store and manipulate data. The following is an overview of some commonly used basic data types:

1. Integers:

is used to store integer values.

There are two types: signed (positive numbers, negative numbers, and zero) and unsigned (positive numbers only).

Common integer data types include short, int, long, long long (in some languages), etc.

In some languages, integer types can automatically adapt to size. For example, in Java, you choose to use long, int, or short, depending on the size of the number.

2. Floating-Point Numbers:

is used to store values ​​with decimal parts.

is divided into two types: single precision (float) and double precision (double).

float usually provides 7 significant figures, while double usually provides 15 significant figures.

Using single precision or double precision depends on the requirements for precision and storage space.

3. Boolean:

is used to store logical values, that is, true or false.

In most languages, Boolean values ​​occupy one byte or less of storage space.

4. Character type (Character):

is used to store a single character or letter.

In most languages, character types occupy one byte or less of storage space.

5. String:

is used to store text data or character sequences.

can contain letters, numbers, symbols and other characters.

Strings typically use dynamically allocated memory space so they can be resized as needed.

6. Empty value or null (Null):

Indicates a special state with no value or no object reference.

In some languages, null is a special data type that can be used with any other data type.

7. Enumerations:

Used to define a set of named constants and related data types.

Can be used to create custom data types with fixed collections.

8. Structures:

Used to combine different types of data.

Can contain different types of fields or attributes.

9. Unions:

In some languages, a union is a special data type that can store multiple different types of data, but only can contain one of the values.

Commonly used to save memory space, especially in embedded systems and memory-constrained situations.

10. Pointers:

Pointers are variables that store the memory addresses of other variables (such as integers, floating point numbers, characters, etc.). Pointers are particularly important in languages ​​such as C and C, and are often used for passing parameters by reference, dynamic memory allocation and management, etc. Pointers need to be used with caution, as incorrect pointer manipulation may cause program crashes or other problems.

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