Data categories and data ranges in Go language

Go language is an open source programming language. It has many unique features, one of which is its data types and data ranges. In this article, we will take an in-depth look at the various data types in Go and their data ranges.

1. Numeric types

Go language supports multiple numeric types, including integers and floating point types. Integer types are divided into signed integer types and unsigned integer types. Signed integer types include int8, int16, int32, int64 and int, and unsigned integer types include uint8, uint16, uint32 and uint64. The data type of int depends on the specific platform, and may be 32 bits (4 bytes) or 64 bits (8 bytes).

Floating point types include float32 and float64, which are used to represent 32-bit and 64-bit floating point values ​​respectively. In addition, the Go language also provides a plurality type complex64 and complex128 for representing complex values.

The data range of numerical types is as follows:

• int8: -128 to 127
• uint8: 0 to 255
• int16: -32768 to 32767
• uint16: 0 to 65535
• int32: -2147483648 to 2147483647
• uint32: 0 to 4294967295
• int64: -9223372036854775808 to 92233720368547 75807
• uint64: 0 to 18446744073709551615
• float32: -3.4028235E 38 to 3.4028235E 38
• float64: -1.7976931348623157E 308 to 1.7976931348623157E 308

2. Boolean type

The Boolean type has only two possible values: true and false. The size of boolean type in Go language is 1 byte.

3. String type

The string type is one of the most commonly used types in the Go language. It is a fixed-length sequence of characters, each represented by UTF-8 encoding. In Go language, a string can be represented by double quotes or backticks.

The size of the string type depends on the length of the string, but in general, the size of the string type in the Go language is 2 times the string length.

4. Derived types

Go language also supports some derived types, including pointer types, array types, slice types, dictionary types, interface types and structure types.

The pointer type represents a pointer to a memory address, which points to the location of a variable or data structure.

The array type represents an ordered collection of elements of the same type with a fixed length. The length of the array can be determined when it is defined, so the size of the array is also fixed.

The slice type represents a variable-length sequence composed of elements of the same type. Slices are built on top of arrays, and their size can change dynamically.

The dictionary type is an unordered collection of key-value pairs, consisting of elements of the same type. The dictionary type is implemented similarly to a hash table.

An interface type represents an abstract type that contains zero or more methods. Interface types in Go are particularly useful, allowing programmers to write flexible code because the methods of interface types can be implemented by different types of objects.

The structure type represents an ordered collection of elements of different types. A structure type is a custom type in which any number of fields can be defined.

Summary

In this article, we took an in-depth look at the characteristics and data scope of various data types in the Go language. Whether it is a numeric type, a Boolean type, a string type or a derived type, the Go language provides a wealth of features to meet the needs of developers. For beginners of Go language, understanding the characteristics and usage of these data types will help to better master the language.

The above is the detailed content of Data categories and data ranges in Go language. For more information, please follow other related articles on the PHP Chinese website!