Home » Golang » Golang Programs

Golang program to find the count of command-line arguments

Here, we are going to learn how to find the count of command-line arguments in Golang (Go Language)?
Submitted by Nidhi, on April 12, 2021 [Last updated : March 04, 2023]

Finding the count of command-line arguments in Golang

Problem Solution:

In this program, we will pass arguments at the command line during the execution of the program. Here we will find the count of arguments and then print program name and arguments on the console screen.

Program/Source Code:

The source code to find the count of command-line arguments is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

Golang code to find the count of command-line arguments

// Golang program to find the count of
// command-line arguments

package main

import "fmt"
import "os"

func main() {
	programName := os.Args[0]

	fmt.Println("Total Arguments: ", len(os.Args))
	fmt.Println("Program Name: ", programName)

	fmt.Println("\nArguments:")
	for i := 1; i < len(os.Args); i++ {
		fmt.Printf("\tArgument[%d]: %s\n", i, os.Args[i])
	}
}

Output:

$ go run hello.go "Hello World" 108 10.5
Total Arguments:  4
Program Name:  /tmp/go-build3236073499/b001/exe/hello

Arguments:
	Argument[1]: Hello World
	Argument[2]: 108
	Argument[3]: 10.5

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt, os packages then we can use a function related to the fmt and os package.

In the main() function, we passed arguments at the command line, and then we find the count of command-line arguments using the len() function. After that, we printed the program name and other arguments on the console screen.

Golang Command-Line Arguments Programs »

---