How to use constants in Golang
What is a Constant or Const in Golang? Here's what you need to know about using constants in Go.
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 lexical scope, meaning the scope can be determined at compile time. A variable is only accessible within the block of code in which it is defined.
For example:
package main
import "fmt"
// Khai báo biến toàn cụ
var myVariable int = 100
func main() {
// Biến cục bộ trong hàm chính
var localVar int = 200
fmt.Printf("Inside main - Global variable: %d\n", myVariable)
fmt.Printf("Inside main - Local variable: %d\n", localVar)
display()
}
func display() {
fmt.Printf("Inside display - Global variable: %d\n", myVariable)
}Variable scope syntax in Golang
var variableName type = value Local variables
Local variables are declared within a function or a block and cannot be accessed outside that block. They can also be declared within loops and conditionals but are limited to the scope of the block.
For example:
package main
import "fmt"
func main() {
var localVar int = 200 // Biến cục bộ
fmt.Printf("%d\n", localVar) // Có thể truy cập tại đây
}
Result:
200Global variables
Global variables are defined outside any function or block, making them accessible throughout the entire program.
For example:
package main
import "fmt"
// Khai báo biến toàn cục
var myVariable int = 100 // Biến toàn cục
func main() {
fmt.Printf("%d\n", myVariable) // Có thể truy cập tại đây
}
Result:
100Local variable priority
When a local variable has the same name as a global variable, the local variable takes precedence within its scope.
For example:
package main
import "fmt"
// Khai báo biến toàn cục
var myVariable int = 100 // Biến toàn cục
func main() {
var myVariable int = 200 // Biến cục bộ
fmt.Printf("Local variable takes precedence: %d\n", myVariable) // Truy cập biến cục bộ
}
Result:
Biến cục bộ có mức độ ưu tiên: 200Volatile functions in Golang
Variadic functions in Go allow you to pass a variable number of arguments to a function. Here's everything you need to know about variadic functions in Golang.
Named return parameters in Golang
In Golang, named return parameters are often referred to as named parameters. Golang allows naming the return parameters or results of functions in the function signature or definition.
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.
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.
How to regain access to hard drive, fix error of not being able to open hard drive
In this article, we will guide you how to regain access to your hard drive when it fails. Let's follow along!
How to use dental floss
Dental floss is a common tool for cleaning teeth, however, not everyone knows how to use it properly. Below are instructions on how to use dental floss to clean teeth effectively.
How to gain muscle according to experts
Building muscle takes time and the right training, but its something anyone can do. Heres how to build muscle, according to experts.
The Best Diets for Heart Health
In addition to regular exercise and not smoking, diet is one of the best ways to protect your heart. Here are the best diets for heart health.
How to cure insomnia for pregnant women in the last 3 months
The third trimester is often the most difficult time to sleep during pregnancy. Here are some ways to treat insomnia in the third trimester.
Scientifically Proven Ways to Automatically Burn Calories
There are many ways to lose weight without changing anything in your diet. Here are some scientifically proven automatic weight loss or calorie-burning methods that anyone can use.
All about iOS 26
Apple has introduced iOS 26 – a major update with a brand new frosted glass design, smarter experiences, and improvements to familiar apps.
Yoga exercises to treat insomnia
Yoga can provide many health benefits, including better sleep. Because yoga can be relaxing and restorative, its a great way to beat insomnia after a busy day.
What is the flower of the other shore? Meaning and legend of the flower of the other shore
The flower of the other shore is a unique flower, carrying many unique meanings. So what is the flower of the other shore, is the flower of the other shore real, what is the meaning and legend of the flower of the other shore?
Healthy snacks that help you lose weight
Craving for snacks but afraid of gaining weight? Dont worry, lets explore together many types of weight loss snacks that are high in fiber, low in calories without making you try to starve yourself.
What to do when you have trouble sleeping?
Prioritizing a consistent sleep schedule and evening routine can help improve the quality of your sleep. Heres what you need to know to stop tossing and turning at night.
How to add a printer to Windows 10
Adding a printer to Windows 10 is simple, although the process for wired devices will be different than for wireless devices.
The most commonly deficient nutrients in the diet
Diet is important to our health. Yet most of our meals are lacking in these six important nutrients.
How to get beautiful nails quickly
You want to have a beautiful, shiny, healthy nail quickly. The simple tips for beautiful nails below will be useful for you.
The best laptops for students in 2025
Students need a specific type of laptop for their studies. It should not only be powerful enough to perform well in their chosen major, but also compact and light enough to carry around all day.