Hello, World! is the first basic program in any programming language. You can write this first program in Golang by following the steps below.
First, open the Go compiler. In the Go language, programs are saved with the .go extension and are UTF-8 text files.
Now, first add the main package to your program:
package mainEvery program must start with a package declaration . In Go, packages are used to organize and reuse code. In Go , there are two types of programs available, executables and libraries. Executables are programs that can be run directly from the terminal. Libraries are program packages that we can reuse in our programs. Here, the main package tells the compiler that the package should be compiled into an executable program, not a shared library. This is the starting point of the program and also contains the main function .
After adding main package import “fmt” package to your program:
import(
"fmt"
)Here, import keyword is used to import packages into the program and fmt package is used to implement formatted Input/Output using functions.
Now write code in main function to print hello world in Go language:
func main() {
fmt.Println("!... Hello World ...!")
}In the above lines of code, we have:
For example:
// Chương trình Go đầu tiên
package main
import "fmt";
// Hàm chính
func main() {
fmt.Println("!... Hello World ...!")
}
Result:
!... Hello World ...!How to run Golang program
To run a Go program, you need a Go compiler. Once you have a Go compiler, first create a program and save your program with the .go extension , for example, first.go . Now we run this first.go file in the go compiler using the following command, i.e.:
$ go run first.go
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