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Online Go Compiler

Write, compile, run, and debug Go code online in a full-featured browser IDE. Work with multiple files, save your workspace, and collaborate in real time - no setup required.

Pre-installed Libs
🚀 206,970 total executions (799 this month)
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Practice Go with coding challenges

Solve hands-on problems right in this editor: run the sample tests, submit, and get an AI code review.

All Go challenges
Easy

Rectangle Perimeter

Compute the perimeter of a rectangle from its sides.

You'll learn ArithmeticReturn values
BeginnerLearning-pathVariables
Python C++ C# Java JavaScript Go Rust Kotlin Swift
12 solved
View solutions (12)
Easy

Distance Between Points

Compute the straight-line distance between two points.

You'll learn Pythagorean theoremSquare roots
BeginnerFunctionsLearning-pathmath
Python C++ C# Swift Java JavaScript Go Rust Kotlin
7 solved
View solutions (7)
Easy

Days in a Month

Return how many days a month has, including leap years.

You'll learn Calendar rulesHelper functions
BeginnerConditionsFunctionsLearning-path
Python C++ C# Java JavaScript Go Rust Kotlin Swift
6 solved
View solutions (6)
Easy

Average of Three

Average three whole numbers.

You'll learn ArithmeticDivision
BeginnerLearning-pathVariables
Python C++ C# Java JavaScript Go Rust Kotlin Swift
6 solved
View solutions (6)
Easy

Dot Product of Two Vectors

Multiply two vectors element by element and add the results: the core operation of every neuron.

You'll learn VectorsDot product
Neural networksaimachine learning
Python C++ C# Java JavaScript Go Rust Kotlin Swift
4 solved
View solutions (4)
Easy

Largest of Three

Pick the largest of three numbers without a built-in max.

You'll learn ComparisonsCombining conditions
BeginnerConditionsLearning-path
Python C++ C# Java JavaScript Go Rust Kotlin Swift
4 solved
View solutions (4)
Easy

Prime Number Check

Decide whether a number is prime.

You'll learn DivisibilityLoop optimization
BeginnerLoopsNumbersStudent-beginner
Kotlin Swift Python C++ C# Java JavaScript Go Rust
3 solved
View solutions (3)
Easy

Number Triangle

Build a triangle of increasing numbers.

You'll learn Growing rowsCounters across rows
BeginnerLearning-pathNested-loopsPatterns
Python C++ C# Java JavaScript Go Rust Kotlin Swift
3 solved
View solutions (3)
Easy

Armstrong Number

Check whether a number equals the sum of its digits raised to the digit count.

You'll learn Digit extractionPowers
BeginnerNumbersStudent-beginner
JavaScript Python C++ C# Java Go Rust Kotlin Swift
3 solved
View solutions (3)
Easy

Row Sums

Add up every row of a grid.

You'll learn 2D listsNested loops
BeginnerGridsLearning-path
Python C++ C# Java JavaScript Go Rust Kotlin Swift
3 solved
View solutions (3)
Easy

Min and Max Together

Find the smallest and largest value in one pass.

You'll learn Single passMultiple return values
ArraysBeginnerFunctionsLearning-path
Python C++ C# Java JavaScript Go Rust Kotlin Swift
3 solved
View solutions (3)
Easy

Count Pairs With a Sum

Count pairs of positions whose values add up to a target.

You'll learn Pairs of indexesAvoiding double counts
ArraysBeginnerLearning-pathNested-loops
Python C++ C# Java JavaScript Go Rust Kotlin Swift
3 solved
View solutions (3)

🐹 About This Go Online Executor

The CodeUtility Go Executor lets you write and run Go code directly in your browser - no installation, setup, or local environment required. It’s powered by a secure sandbox that supports real Go compiler versions 1.19, 1.20, and 1.21.

This tool compiles and executes real Go programs in the cloud, giving you an authentic Go environment. You can test short snippets, experiment with packages, and explore Go’s powerful concurrency features using goroutines and channels.

It’s perfect for learning and practicing core Go concepts such as variables, functions, structs, slices, maps, interfaces, and error handling - all without installing any tools locally.

Whether you’re exploring Go for the first time, testing backend logic, or learning how concurrency works, the CodeUtility Go Executor offers a clean, fast, and browser-based way to run Go code instantly.

More than a code runner

Use a multi-file editor, an isolated execution terminal, runtime-specific libraries, persistent workspaces, sharing, and real-time collaboration from the same executor.

How to use this executor?

Choose a runtime, open or create a file, write your code, and select Run. Output appears in the terminal, while signed-in users can keep files in a workspace, install libraries, and collaborate through shares.

  1. Select a version and edit the current file or open another workspace file.
  2. Run the code, provide input in the terminal when requested, and review saved run history.
  3. Use libraries, workspace tools, sharing, and chat when your task needs more than one snippet.

💡 Go Basics & Examples You Can Try Above

1. Declaring Variables and Constants

Use var or := to declare variables. Use const for constants.

package main

var x int = 10
const Pi = 3.14

func main() {
    name := "Alice"
    isActive := true
    println(x, Pi, name, isActive)
}

2. Conditionals (if / switch)

Go supports if-else and switch statements with clean syntax.

x := 2
if x == 1 {
    println("One")
} else if x == 2 {
    println("Two")
} else {
    println("Other")
}

switch x {
case 1:
    println("One")
case 2:
    println("Two")
default:
    println("Other")
}

3. Loops

Go uses only the for loop, but it can act like a while loop.

for i := 0; i < 3; i++ {
    println(i)
}

n := 3
for n > 0 {
    println(n)
    n--
}

4. Arrays

Arrays have fixed size. Use slices for dynamic lists.

var nums = [3]int{10, 20, 30}
println(nums[1])

5. Slice Manipulation

Use slices and the built-in append, len, copy, and slicing syntax.

fruits := []string{"apple", "banana"}
fruits = append(fruits, "cherry")
fruits = fruits[1:]  // slice
println(len(fruits))

for _, fruit := range fruits {
    println(fruit)
}

6. Console Input/Output

Use fmt.Print, fmt.Scan, and fmt.Println.

import "fmt"

var name string
fmt.Print("Enter your name: ")
fmt.Scan(&name)
fmt.Println("Hello", name)

7. Functions

Functions are declared with func and can return multiple values.

func greet(name string) string {
    return "Hello, " + name
}

message := greet("Alice")
println(message)

8. Maps

Maps are key-value stores. Declare with make().

ages := map[string]int{"Alice": 30}
ages["Bob"] = 25
println(ages["Alice"])

9. Error Handling

Go uses multiple return values for errors instead of exceptions.

import "errors"

func fail() error {
    return errors.New("something went wrong")
}

err := fail()
if err != nil {
    println(err.Error())
}

10. File I/O

Use os and io/ioutil packages to read/write files.

import (
  "fmt"
  "os"
  "io/ioutil"
)

ioutil.WriteFile("file.txt", []byte("Hello File"), 0644)

data, _ := ioutil.ReadFile("file.txt")
fmt.Println(string(data))

11. String Manipulation

Use the strings package for string operations.

import "strings"

text := "  Hello World  "
println(strings.TrimSpace(text))
println(strings.ToUpper(text))
println(strings.ReplaceAll(text, "Hello", "Hi"))

words := strings.Split(text, " ")
fmt.Println(words)

12. Structs & Objects

Use structs to define custom types with methods.

type Person struct {
  Name string
}

func (p Person) Greet() string {
  return "Hi, I'm " + p.Name
}

p := Person{Name: "Alice"}
println(p.Greet())

13. References (Pointers)

Go supports pointers using * and &.

x := 10
ptr := &x
*ptr = 20
println(x) // 20