Keywords in Go
Keyword - Keywords are words in a language that are used for some internal processes or represent some predefined actions. Here is what you need to know about keywords in Golang.
Nested Structure in Golang
A structure or struct in Golang is a user-defined type that allows us to create a group of elements of different types into a single unit. Any real-world entity that has some set of properties or fields can be represented as a struct.
How to use nested structures in Golang
Go language allows nested structures. A structure that is a field of another structure is called a Nested Structure. In other words, a structure inside another structure is called a Nested Structure. Syntax:
type struct_name_1 struct{
// Các trường
}
type struct_name_2 struct{
variable_name struct_name_1
}Consider the following example to understand nested structure in Golang:
Example 1:
// Chương trình Go minh hoạc
// cấu trúc lồng nhau
package main
import "fmt"
// Tạo cấu trúc
type Author struct {
name string
branch string
year int
}
// Tạo cấu trúc lòng nhau
type HR struct {
// cấu trúc là một trường
details Author
}
func main() {
// Khởi tạo các trường
// của cấu trúc
result := HR{
details: Author{"Sona", "ECE", 2013},
}
// Hiện giá trị
fmt.Println("\nDetails of Author")
fmt.Println(result)
}
Result:
Details of Author
{{Sona ECE 2013}}Example 2:
// Chương trình Golang minh họa
// cấu trúc lồng nhau
package main
import "fmt"
// Tạo cấu trúc
type Student struct {
name string
branch string
year int
}
// Tạo cấu trúc lồng nhau
type Teacher struct {
name string
subject string
exp int
details Student
}
func main() {
// Khởi tạo các trường
// của cấu trúc
result := Teacher{
name: "Suman",
subject: "Java",
exp: 5,
details: Student{"Bongo", "CSE", 2},
}
// Hiện giá trị
fmt.Println("Details of the Teacher")
fmt.Println("Teacher's name: ", result.name)
fmt.Println("Subject: ", result.subject)
fmt.Println("Experience: ", result.exp)
fmt.Println("\nDetails of Student")
fmt.Println("Student's name: ", result.details.name)
fmt.Println("Student's branch name: ", result.details.branch)
fmt.Println("Year: ", result.details.year)
}
Result:
Details of the Teacher
Teacher's name: Suman
Subject: Java
Experience: 5
Details of Student
Student's name: Bongo
Student's branch name: CSE
Year: 2Example 3:
In Go, a structure can have fields that are themselves structures, called nested structures. Here is an example of a structure that has a nested structure:
package main
import (
"fmt"
)
type Address struct {
Street string
City string
State string
PostalCode string
}
type Person struct {
FirstName string
LastName string
Age int
Address Address
}
func main() {
p := Person{
FirstName: "John",
LastName: "Doe",
Age: 30,
Address: Address{
Street: "123 Main St",
City: "Anytown",
State: "CA",
PostalCode: "12345",
},
}
fmt.Println(p.FirstName, p.LastName)
fmt.Println("Age:", p.Age)
fmt.Println("Address:")
fmt.Println("Street:", p.Address.Street)
fmt.Println("City:", p.Address.City)
fmt.Println("State:", p.Address.State)
fmt.Println("Postal Code:", p.Address.PostalCode)
}
Result:
John Doe
Age: 30
Address:
Street: 123 Main St
City: Anytown
State: CA
Postal Code: 12345Here, we define two struct types: Person and Address. Person has a nested struct field called Address. In the main function, we create a new instance of Person with an Address field. Then, we print the values of various fields of the Person and Address structs using dot notation to access the nested fields.
Data types in Golang
Data types specify what type of data a valid Go variable can hold. In the Go language, types are divided into four categories as follows:
Function arguments in Golang
Go supports two main ways to pass arguments: Pass by Value and Pass by Reference. Go uses pass by value by default.
Function returning multiple values in Golang
In Go language, you are allowed to return multiple values from a function, using the return statement. In other words, in a function, a return statement can return multiple values.
Switch Statement in Go
Golang like most other programming languages has switch statement. Here is how to use switch statement in Golang.
Cases to know when using selection statements in Golang
In this article, we will learn how to use default case to avoid deadlock. But first, we will learn what is deadlock case when using select command in Golang?
Anonymous structures and fields in Golang
Anonymous structs in Golang are temporary structures with no names used for one-time purposes, while anonymous fields allow embedding of unnamed fields.
How to use Rune in Golang
What is Rune in Golang? How to use Rune in Golang? This article will give you the answer.
How to use operators in Golang
Operators allow us to perform different types of operations on operands. In Go language, operators can be classified based on their different functions.
Void identifier in Golang
_(underscore) in Golang is called Blank Identifier. Identifier is a user-defined name of program elements used for identification purposes.
How to create basic program in Golang
Hello, World! is the first basic program in any programming language. You can write this first program in Golang by following the steps below.
How to Install Go on Windows
Golang can be easily installed on Windows. Here is a step-by-step guide to install Golang on Windows.
Methods with the same name in Golang
Golang allows creating two or more methods with the same name in the same package, but the receivers of these methods must be of different types.
Functions in Go
In Go, functions are blocks of code that perform specific tasks, which can be reused throughout the program to save memory, improve readability, and save time.
Variable Scope in Go
The scope of a variable in Golang determines which part of the program the variable is accessible to. In Go, all identifiers have a lexical scope that is determined at compile time.
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