Supported Languages & Execution Guide

Everything you need to know about the languages CoderKit supports and how to use them.

🌍 Supported Languages Overview

CoderKit supports 15+ programming languages across multiple domains:

| Language | Best For | Status | Runtime | |----------|----------|--------|---------| | 🐍 Python | Data science, scripting, learning | ✅ Full support | Python 3.10 | | ☕ Java | OOP, Android, enterprise | ✅ Full support | OpenJDK 8+ | | 🌐 JavaScript | Web, frontend, interactive | ✅ Full support | Rhino/V8 | | 🎨 HTML/CSS | Web pages, styling | ✅ Full support | WebView | | 🔧 C | Systems, embedded, competitive | ✅ Full support | Clang | | ➕ C++ | Systems, algorithms, games | ✅ Full support | Clang | | 🎯 Go | Backend, cloud, DevOps | ✅ Full support | Go 1.20 | | 💎 Groovy | JVM scripting, testing | ✅ Full support | OpenJDK | | 🔮 Clojure | Functional, JVM | ✅ Full support | OpenJDK | | 💾 SQL | Databases, queries | ✅ Full support | SQLite | | 🐚 Bash | Shell scripting, automation | ✅ Full support | Busybox | | 📝 JSON | Data format, config | ✅ Full support | Syntax highlighting | | 🏷️ XML | Markup, config | ✅ Full support | Syntax highlighting | | 🔴 PHP | Server-side web (coming soon) | 🔄 In development | PHP 8.0 | | 💎 Ruby | Web, scripting (coming soon) | 🔄 In development | Ruby 3.0 |

🐍 Python

What is Python?

Beginner-friendly syntax (reads like English)
Powerful (data science, AI, web backends)
Versatile (can do anything)

Python Capabilities in CoderKit

Execution:

✅ Run Python scripts
✅ Interactive console (REPL)
✅ Real-time output streaming
✅ Handle user input (input() function)

Libraries Pre-installed:

Data Science: NumPy, Pandas, SciPy, Scikit-learn
Web: Flask, Django, Requests, BeautifulSoup
Utilities: Pillow, Matplotlib (PNG export), Regex
Math: SymPy, NetworkX

Code Example:

import random

def guess_number():
    secret = random.randint(1, 100)
    guesses = 0
    
    while True:
        guess = int(input("Guess a number (1-100): "))
        guesses += 1
        
        if guess == secret:
            print(f"✓ Correct! You guessed in {guesses} tries!")
            break
        elif guess < secret:
            print("↑ Too low, try again!")
        else:
            print("↓ Too high, try again!")

if __name__ == "__main__":
    guess_number()

Run in CoderKit:

▶ Run
→ Guess a number (1-100): 50
↑ Too low, try again!
→ Guess a number (1-100): 75
↓ Too high, try again!
→ Guess a number (1-100): 62
✓ Correct! You guessed in 3 tries!

Python Courses in CoderKit

Python 101 - Variables, loops, functions (free)
Python 201 - OOP, file I/O, libraries
Python 301 - Advanced patterns, decorators, generators
Python 401 - Async, networking, web apps

Python Tips

Start simple - Hello World, then add features
Use libraries - NumPy, Pandas make data work easier
Interactive mode - Test snippets before using in scripts
Error messages - Python's are usually helpful

☕ Java

What is Java?

Object-oriented (everything is a class)
Compiled then interpreted (JVM runs code)
Enterprise standard (banks, corporations use it)
Android foundation (mobile apps)

Java Capabilities in CoderKit

Execution:

✅ Compile to bytecode
✅ Run on embedded JVM
✅ Full OOP support
✅ Standard library (java.lang, java.util, etc.)

Code Example:

import java.util.Scanner;

public class Calculator {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        System.out.print("Enter first number: ");
        double a = sc.nextDouble();
        
        System.out.print("Enter operator (+, -, *, /): ");
        String op = sc.next();
        
        System.out.print("Enter second number: ");
        double b = sc.nextDouble();
        
        double result = calculate(a, b, op);
        System.out.println("Result: " + result);
    }
    
    static double calculate(double a, double b, String op) {
        return switch(op) {
            case "+" -> a + b;
            case "-" -> a - b;
            case "*" -> a * b;
            case "/" -> a / b;
            default -> 0;
        };
    }
}

Run in CoderKit:

▶ Run
Enter first number: 10
Enter operator (+, -, *, /): *
Enter second number: 5
Result: 50.0

Java Courses in CoderKit

Java 101 - Basics, classes, objects (free)
Java 201 - Inheritance, polymorphism, generics
Java 301 - Advanced patterns, streams, threading

Java Tips

Use public static void main - Standard entry point
Compile errors first - Fix syntax before running
Use Scanner - For reading user input
Import libraries - import java.util.*, etc.

🌐 JavaScript & Web

What is JavaScript?

Run in browsers (or on servers with Node.js)
Interactive web (buttons, forms, animations)
ES6+ modern (arrow functions, async/await, destructuring)

JavaScript in CoderKit

Execution:

✅ ES6+ syntax (arrow functions, const/let, template literals)
✅ DOM manipulation (document.querySelector, etc.)
✅ Event handling (click, input, submit)
✅ Modern APIs (fetch, promises, async/await)
✅ Console logging (debugging)

HTML/CSS/JS Integration:

<!DOCTYPE html>
<html>
<head>
    <title>Todo App</title>
    <style>
        body { font-family: Arial; }
        .done { text-decoration: line-through; }
    </style>
</head>
<body>
    <h1>My Todo List</h1>
    <input id="todoInput" type="text" placeholder="Add a task...">
    <button onclick="addTodo()">Add</button>
    <ul id="todoList"></ul>
    
    <script>
        let todos = [];
        
        function addTodo() {
            const input = document.getElementById('todoInput');
            const text = input.value.trim();
            
            if (text) {
                todos.push(text);
                renderTodos();
                input.value = '';
            }
        }
        
        function renderTodos() {
            const list = document.getElementById('todoList');
            list.innerHTML = todos
                .map((todo, i) => 
                    `<li>
                        <span>${todo}</span>
                        <button onclick="removeTodo(${i})">Delete</button>
                    </li>`
                ).join('');
        }
        
        function removeTodo(i) {
            todos.splice(i, 1);
            renderTodos();
        }
    </script>
</body>
</html>

See Live Preview:

[Editor on left] [Preview on right with Todo app]
Type in input → Click Add → Todo appears in list
Click Delete → Todo removed

React & Vue Support

CoderKit supports modern frameworks:

React Example:

import React, { useState } from 'react';

export default function Counter() {
  const [count, setCount] = useState(0);
  
  return (
    <div style={{ textAlign: 'center', padding: '20px' }}>
      <h1>Counter: {count}</h1>
      <button onClick={() => setCount(count + 1)}>
        Increment
      </button>
    </div>
  );
}

Run Preview → See interactive counter

Web Courses

Web 101 - HTML, CSS, JavaScript basics (free)
Web 201 - DOM, events, responsive design
Web 301 - React, Vue, modern frameworks

Web Tips

Live preview - See changes in real-time
Developer console - See console.log() output
Mobile responsive - Test on different sizes
Inspect elements - Right-click → Inspect (in preview)

🔧 C / C++

What is C?

Low-level (memory management, pointers)
Fast (compiled to native code)
Systems programming (OS, embedded, games)

What is C++?

C with objects (OOP on top of C)
Modern C++ (C++17/20 features in CoderKit)
Performance (game engines, finance systems)

C/C++ Execution

Code Example (C):

#include <stdio.h>

int fibonacci(int n) {
    if (n <= 1) return n;
    return fibonacci(n - 1) + fibonacci(n - 2);
}

int main() {
    printf("Fibonacci sequence:\n");
    for (int i = 0; i < 10; i++) {
        printf("fib(%d) = %d\n", i, fibonacci(i));
    }
    return 0;
}

Output:

Fibonacci sequence:
fib(0) = 0
fib(1) = 1
fib(2) = 1
fib(3) = 2
...
fib(9) = 34

C++ Example (OOP):

#include <iostream>
using namespace std;

class Rectangle {
private:
    double width, height;
    
public:
    Rectangle(double w, double h) : width(w), height(h) {}
    
    double getArea() { return width * height; }
    double getPerimeter() { return 2 * (width + height); }
};

int main() {
    Rectangle rect(5, 3);
    cout << "Area: " << rect.getArea() << endl;
    cout << "Perimeter: " << rect.getPerimeter() << endl;
    return 0;
}

C/C++ Courses

C 101 - Basics, pointers, memory
C 201 - Data structures, algorithms

C/C++ Tips

Memory management - Free allocated memory
Compilation - C/C++ must compile before running
Debugging - Check compiler errors carefully
Performance - Competitive programming advantage

🎯 Go

What is Go?

Simple (designed for simplicity & clarity)
Fast (compiled to native)
Concurrent (goroutines for async)
Cloud native (Docker, Kubernetes written in Go)

Go Example

package main

import (
    "fmt"
    "time"
)

func worker(id int, jobs <-chan int, results chan<- int) {
    for job := range jobs {
        fmt.Printf("Worker %d processing job %d\n", id, job)
        time.Sleep(time.Second)
        results <- job * 2
    }
}

func main() {
    jobs := make(chan int, 5)
    results := make(chan int, 5)
    
    // Start 2 workers
    for w := 1; w <= 2; w++ {
        go worker(w, jobs, results)
    }
    
    // Send 5 jobs
    for j := 1; j <= 5; j++ {
        jobs <- j
    }
    close(jobs)
    
    // Collect results
    for r := 1; r <= 5; r++ {
        fmt.Printf("Result: %d\n", <-results)
    }
}

Go Courses

Go 101 - Basics, goroutines
Go 201 - Web servers, APIs

💾 SQL & Databases

What is SQL?

Query language (talk to databases)
CRUD operations (Create, Read, Update, Delete)
Powerful (filtering, joining, aggregating)

SQL Example

-- Create table
CREATE TABLE users (
    id INTEGER PRIMARY KEY,
    name TEXT,
    age INTEGER,
    email TEXT
);

-- Insert data
INSERT INTO users (name, age, email) VALUES
('Alice', 28, 'alice@example.com'),
('Bob', 35, 'bob@example.com');

-- Query data
SELECT name, age FROM users WHERE age > 30;

-- Update data
UPDATE users SET age = 29 WHERE name = 'Alice';

-- Delete data
DELETE FROM users WHERE id = 1;

SQL in CoderKit

SQLite (embedded database)
Interactive (write queries, see results instantly)
Visualization (see tables as they change)

SQL Courses

SQL 101 - Basics, queries, tables

💎 Other Languages

Groovy

JVM language (Java compatibility)
Dynamic typing (easier than Java)
Great for scripting

Clojure

Functional programming
Lisp dialect (parentheses-heavy)
Immutability-first

Bash

Shell scripting
System administration
Command automation

JSON & XML

Data formats (not runnable)
Syntax highlighting only
Validation tools

🔄 Language Runtime Management

Download Runtimes

On first use:

Select language in IDE
"Python not installed" → Tap Download
Wait 2-5 minutes (WiFi recommended)
~150-300MB per runtime

Manage Runtimes:

Settings → Languages → Installed
See which languages downloaded
Delete unused languages (free storage)
Re-download anytime

Language Limitations

Not Supported Yet:

🔴 PHP (coming Q2 2026)
🔴 Ruby (coming Q2 2026)
🔴 Swift (limited ARM support)
🔴 Kotlin (same as Java, use Java instead)

Offline Execution:

✅ Python, Java, C/C++, Go, Bash (fully offline)
✅ JavaScript (offline via bundled engine)
✅ HTML/CSS (offline via WebView)
⚠️ Web frameworks (require npm packages—partial offline)

💡 Choosing a Language

For Beginners

Start with: Python
Why: Easy syntax, powerful, great for learning fundamentals

Path: Python 101 → 201 → 301 → Choose specialization

For Web Development

Start with: JavaScript + HTML/CSS
Why: Required for frontend, fun to see results immediately

Path: Web 101 → 201 → React/Vue specialization

For Computer Science

Start with: Python (fundamentals) → Java (OOP) → C (systems)
Why: Progressive complexity, builds solid foundation

Path: Python → Java → C track

For Competitive Programming

Start with: Python (fast development) or C++ (performance)
Why: Python for algorithms, C++ for micro-optimizations

Path: Python 101 → Algorithms course → Practice problems

🆘 Troubleshooting

Language Download Fails

Check internet connection
Try again (servers might be busy)
Use WiFi instead of cellular
Check storage space available

Code Won't Run - Syntax Error

Red underline shows error location
Read error message
Check language-specific syntax rules
Review examples in lessons

"Language Not Installed"

Download runtime in Settings → Languages
Or wait—app will prompt on first use
Can't install? Delete other runtimes to free space

Slow Execution

Python/Java: Normal for interpreted/JVM languages
C/C++: Should be fast; check code efficiency
JavaScript: Browsers are slower; use modern syntax

🚀 Next Steps

✅ Choose your language? Start coding!
📚 Want to learn properly? Jump to Learn Mode
🏆 Ready for challenges? Practice problems await

Which language calls to you? 🚀