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.
Control Statements in Golang (if, if-else, Nested-if)
What conditional statements does Golang have? How to use conditional statements in Go programming? Let's find out together!
Decision making in programming is similar to decision making in real life. In this process, a piece of code is executed when a given condition is met. They are also sometimes called Control flow statements. Golang uses control statements to control the flow of execution of a program based on certain conditions. They are used to make the flow of execution advance and branch based on changes in the state of the program.
Basic conditional statements in Golang programming
If statement
This is the simplest decision statement. It is used to decide whether a statement or block of statements will be executed or not, i.e. if a condition is true then a block of statements will be executed, otherwise not.
Syntax:
if condition {
// Lệnh được thực thi nếu
// điều kiện đúng
}Flow Chart:
For example:
// Go program to illustrate the
// use of if statement
package main
import "fmt"
func main() {
// lấy một biến cục bộ
var v int = 700
// dùng lệnh if để
// kiểm tra điều kiện
if v < 1000="" {="" in="" điều="" kiện="" if="" sau="" điều="" kiện="" đánh="" giá="" đúng="" fmt.printf("v="" is="" less="" than="" 1000\n")="" }="" fmt.printf("value="" of="" v="" is="" :="" %d\n",="" v)="" }="">Result:
v is less than 1000
value of v is : 700if…else statement
The else statement alone tells us that if the condition is true then it will execute a block of code and if the condition is false then it will not execute. But what if we want to do something else when the condition is false. This is where the else statement comes in. We can use the else statement with the if statement to execute a block of code when the condition is false.
Syntax:
if condition {
// Triển khai khối này nếu
// điều kiện đúng
} else {
// Triển khai khối này nếu
// điều kiện sai
}
For example:
// Go program to illustrate the
// use of if...else statement
package main
import "fmt"
func main() {
// taking a local variable
var v int = 1200
// dùng lệnh if
// kiểm tra điều kiện
if v < 1000="" {="" in="" if="" sau="" điều="" kiện="" đánh="" giá="" là="" dúng="" fmt.printf("v="" is="" less="" than="" 1000\n")="" }="" else="" {="" in="" ra="" nội="" dung="" sau="" nếu="" điều="" kiện="" được="" đánh="" giá="" là="" đúng="" fmt.printf("v="" is="" greater="" than="" 1000\n")="" }="" }="">Result:
v is greater than 1000Nested if statements
In Go Language, nested if is a conditional statement that is the target of another if or else. This Golang statement means there are two if statements nested inside each other as the name suggests.
Syntax:
if condition1 {
// Triển khai khi condition1 đúng
if condition2 {
// Triển khai khi condition2 đúng
}
}
For example:
// Minh họa chương trình Go dùng lệnh if lồng nhau
package main
import "fmt"
func main() {
// lấy 2 biến cục bộ
var v1 int = 400
var v2 int = 700
// dùng lệnh if
if( v1 == 400 ) {
// điều kiện đúng thì kiểm tra nội dung sau
if( v2 == 700 ) {
// điều kiện đúng thì hiển thị nội dung sau
fmt.Printf("Value of v1 is 400 and v2 is 700\n" );
}
}
}
Result:
Value of v1 is 400 and v2 is 700Data 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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