Go Playground - Run Golang Code Online

Interactive Go Starter Code

Test out Go functions, slices, and loops with this ready-to-run Fibonacci sequence generator:

package main

import "fmt"

func fibonacci(n int) int {
	a, b := 0, 1
	for i := 0; i < n; i++ {
		a, b = b, a+b
	}
	return a
}

func main() {
	sequence := make([]int, 10)
	for i := range sequence {
		sequence[i] = fibonacci(i)
	}
	fmt.Println("Fibonacci sequence:", sequence)
}

Key Features & Technical Specifications

• Official Go Compile Engine: Compiles source using the official Go Playground compile backend (API version 2), providing accurate output and standard compiler diagnostics.
• Official gofmt Formatting: Reformat your Go source with one click or keyboard shortcut (Ctrl+S / Cmd+S) using standard Go formatting conventions.
• Full Concurrency Support: Experiment with Goroutines, buffered and unbuffered channels, WaitGroups, and concurrent design patterns.
• Standard Library Packages: Access core Go packages such as fmt, strings, math, time, sync, and sort.
• Monaco Code Editor: Syntax highlighting, indentation rules, bracket matching, line numbering, and dark/light themes.
• Vim & Emacs Keybinding Emulation: Work effortlessly with your preferred keyboard controls.
• Safe Execution Watchdog: 10-second abort controller prevents hanging requests on deadlocked channels or infinite loops.

Popular Go (Golang) Examples & Tutorials

Sharpen your Go skills with these runnable examples:

• Slices, Appending, and Iteration in Go – Learn dynamic slices, append(), and for range loops.
• Goroutines and Channels in Go – Run background workers and pass messages through typed channels.
• Structs and Receiver Methods – Define custom types and implement object methods in Go.

Frequently Asked Questions (FAQ)

Is this Go playground free to use?

Yes, the DevsCurry Go playground is completely free, requires no signup, and runs directly in your browser.

How does Go code compile and run in the browser?

Because Go is a compiled language that cannot compile client-side in pure JavaScript, your source code is compiled and executed securely using the official Go Playground compile service, streaming results back to your browser.

Can I format my Go code automatically with gofmt?

Yes, the playground integrates official gofmt formatting. Click Format or press Ctrl+S / Cmd+S to format your Go source code according to official standards.

Does the playground support Goroutines and Channels?

Yes, concurrent Go programs with goroutines, channels, and select statements are fully supported.

What are the execution timeout limits?

Execution requests are managed with a 10-second client timeout to keep your browser responsive and prevent unresponsive network calls.