How to Use the Go Compiler

To use the Go Compiler, follow these steps:

  1. In the code editor, write your Go code.
  2. Click the "RUN" button to compile and run your code.
  3. The output will be displayed in the console below the code editor.

Taking Inputs

In Go, you can take inputs from the user in various ways. Here are some examples:

String Input

package main
import "fmt"
import "bufio"
import "os"

func main() {
    reader := bufio.NewReader(os.Stdin)
    fmt.Print("Enter a string: ")
    input, _ := reader.ReadString('\n')
    fmt.Println("You entered: ", input)

Number Input

package main
import "fmt"

func main() {
    var num int
    fmt.Print("Enter a number: ")
    fmt.Scanf("%d", &num)
    fmt.Println("You entered: ", num)

Importing Libraries

Go has a rich set of built-in libraries that can be used in your programs. Here are some examples:

Using the math Library

package main
import "fmt"
import "math"

func main() {
    result := math.Sqrt(25)
    fmt.Println("Square root of 25 is ", result)

Using the sort Library

package main
import "fmt"
import "sort"

func main() {
    arr := []int{5, 2, 8, 7, 1}
    fmt.Println("Sorted array: ", arr)

Syntax 101

Go is a statically typed, compiled language designed for simplicity and efficiency. Here's a primer on the major syntax basics of Go:


Variables in Go are statically typed and can be declared in different ways.

var name string = "John Doe" // Variable declaration with type and initial value
var age = 25 // Variable declaration with initial value, type inferred

Control Structures

Go includes control structures such as if, else, for, and switch.

// If-Else
if age > 18 {
} else {

// For loop
for i := 0; i < 5; i++ {

// Switch
switch day {
case "Monday":
    fmt.Println("Start of the work week")
case "Friday":
    fmt.Println("End of the work week")


Functions in Go are defined with the func keyword.

func greet(name string) {
    fmt.Println("Hello, " + name)

greet("John Doe") // Calls the function with "John Doe" as the argument

Go Online Test

A Go online test is an effective way to assess an individual's Go programming skills, especially in the context of systems programming. These tests typically include a mix of theoretical questions and practical coding challenges. By attempting these tests, candidates can demonstrate their understanding of Go concepts, their problem-solving abilities, and their proficiency in writing efficient code. Go online tests are commonly used in technical interviews, coding bootcamps, and online learning platforms to gauge a learner's understanding and proficiency in Go.