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Learn Gambas - 10 Code Examples & CST Typing Practice Test

Gambas is a free, object-oriented programming language and development environment based on BASIC, designed primarily for Linux. It allows rapid development of graphical, database, and console applications, with a visual IDE similar to Visual Basic.

View all 10 Gambas code examples →
Gambas Counter and Theme ToggleGambas Random Number GeneratorGambas Todo ListGambas Dice RollerGambas Countdown TimerGambas Prime CheckerGambas Temperature ConverterGambas Shopping CartGambas Name GreetingGambas Stopwatch

Learn GAMBAS with Real Code Examples

Updated Nov 21, 2025

Explain

Gambas extends BASIC with object-oriented features and a rich set of libraries.

It includes an integrated development environment (IDE) with a form designer, debugger, and code editor.

Gambas supports GUI applications, database integration, networking, and multimedia on Linux desktops.

Core Features

BASIC-like syntax with modern enhancements

Classes, modules, and objects

Signals and slots for event-driven programming

Automatic memory management

Integrated debugger and GUI designer

Basic Concepts Overview

Variables and basic data types (Integer, String, Boolean, Array)

Subroutines and functions

Classes, modules, and objects

Event handling with signals and slots

Database connections and queries

Project Structure

Forms/ - GUI form files

Classes/ - object-oriented code

Modules/ - reusable code modules

Resources/ - images, icons, and data files

Config/ - project settings and metadata

Building Workflow

Design forms using the visual designer

Implement event-driven code for GUI components

Organize code into modules and classes

Connect to databases if needed

Debug and run applications via the IDE

Difficulty Use Cases

Beginner: console-based Gambas programs

Intermediate: GUI applications with basic database integration

Advanced: large desktop applications with multiple modules

Expert: complex event-driven and multimedia applications

Enterprise: Linux-only productivity tools and utilities

Comparisons

Similar in syntax to Visual Basic

Slower than compiled languages like C++

Smaller ecosystem than Python or Java

Best suited for Linux desktops rather than cross-platform apps

Offers rapid development with a full IDE

Versioning Timeline

1999 - Initial creation by Benoît Minisini

2000s - Added GUI and object-oriented features

2005 - Gambas 2 major release with improved IDE

2010s - Gambas 3 introduced modern libraries and database support

2025 - Active development with Gambas 3.x series on Linux

Glossary

Form: GUI window in Gambas

Module: reusable code container

Class: object-oriented structure

Signal: event trigger

Slot: method responding to a signal

Installation Setup

Install Gambas via your Linux distribution package manager (e.g., apt, yum, pacman)

Optionally download from the official Gambas website

Install required dependencies for GUI and database support

Launch the IDE and create a new project

Test sample GUI and console applications

Environment Setup

Install Gambas via Linux package manager

Ensure GUI libraries are installed

Launch IDE and configure preferences

Create a new project with form and code files

Test build and run sample applications

Config Files

Project.gambas - project configuration

*.form - GUI layout files

*.module / *.class - code files

Resources/ - images, icons, data files

Settings.gambas - IDE and runtime settings

Cli Commands

gambas3 - launch IDE

gambas3-cli project.gambas - run project from terminal

gbc project.gambas - compile project

gbx project.gambas - export executable

gb3db - manage database connections

Internationalization

UTF-8 support for strings

Resource files for translations

Right-to-left language support

Localized database content

Multi-language form labels and messages

Accessibility

Linux accessibility support via toolkit

Keyboard navigation for GUI forms

Screen reader compatibility

Accessible color contrast options

Internationalization via Unicode strings

Ui Styling

Drag-and-drop form designer

Standard widgets: buttons, labels, text boxes

Layout management for responsive design

Styling via properties and themes

Event handling through signals/slots

State Management

Variables and constants

Object properties and instance variables

Modules for shared state

Signals and slots for event-driven state changes

Automatic memory management

Data Management

Arrays, strings, integers, and objects

Database queries and table handling

File I/O with text and binary files

Serialization for saving application state

Data validation and manipulation methods

Architecture

Gambas IDE (editor, debugger, form designer)

Gambas interpreter and runtime

Built-in libraries (GUI, database, multimedia)

Project files and configuration

Compiled bytecode for execution on Linux systems

Rendering Model

Parse Gambas source code

Compile to bytecode or execute via interpreter

Render GUI forms with integrated toolkit

Connect signals to slots for event-driven behavior

Execute database queries or system calls as needed

Architectural Patterns

Event-driven programming with signals and slots

Modular code with classes and modules

MVC pattern possible for GUI applications

Database integration for data-driven apps

GUI-centric desktop application design

Real World Architectures

Linux desktop GUI applications

Small database management tools

Educational software for programming

Utility and productivity applications

Internal company Linux tools

Design Principles

BASIC-like simplicity for rapid development

Object-oriented with modular code

Integrated IDE for GUI, database, and debugging

Cross-platform Linux support

Emphasis on accessibility and ease of learning

Scalability Guide

Use modules and classes to organize code

Optimize database access with indexes and queries

Minimize GUI redraws for performance

Profile application with IDE debugger

Modularize large applications into reusable components

Migration Guide

Port old Visual Basic or BASIC projects to Gambas

Refactor procedural code to object-oriented modules

Update deprecated library calls

Test forms and event connections

Use Gambas 3 features for modern Linux support

Performance Notes

Gambas is interpreted, so execution is slower than compiled languages

Use modules to organize code and reduce overhead

Avoid excessive nested loops for large data sets

GUI applications are optimized via the IDE’s rendering engine

Memory management is automatic but monitor large datasets

Security Notes

Validate user input for forms and databases

Sanitize SQL queries to prevent injection

Avoid storing sensitive data in plain text

Limit network access when using sockets

Keep the system and Gambas runtime updated

Monitoring Analytics

Use IDE debugger to monitor performance

Log runtime errors and user actions

Check memory usage for long-running apps

Profile SQL queries for efficiency

Monitor GUI responsiveness

Code Quality

Follow Gambas syntax and style conventions

Comment modules and methods

Use consistent naming for forms and controls

Leverage modules and classes for maintainability

Unit test critical subroutines and database operations

Practical Examples

Creating a simple GUI calculator

Developing a database CRUD application

Building an event-driven form application

Networking with sockets in Gambas

Multimedia playback or image processing

Troubleshooting

Check IDE error messages and logs

Ensure correct module and class references

Verify database connections and credentials

Debug event handling and signal connections

Test GUI layouts for proper sizing and alignment

Testing Guide

Test GUI event handling

Verify database CRUD operations

Debug modules independently

Check form layouts and responsiveness

Profile performance for memory and speed

Deployment Options

Executable Gambas projects on Linux desktops

Portable scripts for Linux systems

Debian or RPM packages for distribution

Educational deployment for programming courses

Internal company utilities and productivity tools

Tools Ecosystem

Gambas IDE

Form designer for GUI applications

Built-in debugger and profiler

Database connectors (MySQL, PostgreSQL, SQLite)

Gambas package repository for extensions

Integrations

MySQL, PostgreSQL, SQLite databases

Linux system commands and shell scripts

Networking via TCP/UDP sockets

Multimedia libraries for audio/video

Optional integration with C/C++ libraries

Productivity Tips

Use IDE shortcuts for rapid coding

Design GUI forms visually

Reuse modules for repeated functionality

Leverage database connectors and libraries

Regularly backup projects and resources

Challenges

Debug event-driven code

Integrate databases correctly

Design responsive GUI layouts

Optimize performance for larger datasets

Maintain modular and reusable code

Learning Path

Learn BASIC syntax

Practice Gambas console applications

Explore GUI development with forms

Connect applications to a database

Build complete desktop projects

Skill Improvement Plan

Week 1: Gambas syntax and console programs

Week 2: GUI design and event handling

Week 3: Object-oriented programming with classes and modules

Week 4: Database connectivity and queries

Week 5: Complete GUI projects and testing

Interview Questions

What is Gambas and how is it related to BASIC?

Explain event handling in Gambas.

How do you connect a Gambas project to a database?

What is a module and how is it used?

How does Gambas handle memory management?

Cheat Sheet

PRINT 'Hello' - output text

DIM x AS Integer - declare variable

SUB MySub() ... END - define subroutine

CLASS MyClass ... END - define class

PUBLIC / PRIVATE - visibility modifiers

Books

Gambas Programming by Benoît Minisini

Gambas 3 Development Guide

Linux GUI Programming with Gambas

BASIC Programming Concepts for Gambas

Advanced Gambas Techniques

Tutorials

Basic Gambas syntax and console programs

Creating GUI forms and event handling

Database access and SQL queries

Object-oriented programming with classes and modules

Building complete Gambas applications

Official Docs

Gambas official website and wiki

Gambas 3 reference manuals

Community tutorials and guides

Community Links

Gambas official forums

Stack Overflow Gambas tag

GitHub Gambas projects

Linux desktop developer communities

IRC channels and mailing lists

Community Support

Gambas official forums

Stack Overflow Gambas tag

Linux user groups and tutorials

GitHub projects using Gambas

IRC channels and community mailing lists

Monetization

Distribute Linux desktop apps

Educational and training software

Internal company tools

Open-source community contributions

Consulting and rapid prototyping services

Future Roadmap

Enhanced Linux desktop integration

Expanded library support (networking, multimedia)

Improved performance and runtime optimization

Better IDE usability and debugging tools

Increased community contributions and tutorials

When Not To Use

High-performance or large-scale applications

Cross-platform development beyond Linux

Mobile or web development

Enterprise-grade software requiring heavy support

Projects needing large community support

Final Summary

Gambas is a Linux-focused, object-oriented BASIC language and IDE.

Ideal for rapid development of GUI and database applications.

Supports modular programming with classes and modules.

Includes a visual form designer, debugger, and runtime environment.

Best suited for educational, prototyping, or small Linux desktop applications.

Faq

Is Gambas free?

Yes, licensed under the GPL.

Can Gambas run on Windows or macOS?

Primarily Linux, limited support on other platforms.

Is Gambas object-oriented?

Yes, with classes, modules, and inheritance.

Does Gambas support databases?

Yes, MySQL, PostgreSQL, SQLite, and ODBC connections.

Can Gambas create GUI applications?

Yes, using the integrated form designer in the IDE.

Code Sample Descriptions

1

Gambas Counter and Theme Toggle

DIM count AS INTEGER = 0
DIM isDark AS BOOLEAN = FALSE

PROCEDURE updateUI()
    PRINT "Counter: "; count
    IF isDark THEN
        PRINT "Theme: Dark"
    ELSE
        PRINT "Theme: Light"
    END IF
END PROCEDURE

PROCEDURE increment()
    count += 1
    updateUI()
END PROCEDURE

PROCEDURE decrement()
    count -= 1
    updateUI()
END PROCEDURE

PROCEDURE reset()
    count = 0
    updateUI()
END PROCEDURE

PROCEDURE toggleTheme()
    isDark = NOT isDark
    updateUI()
END PROCEDURE

' Simulate actions
updateUI()
increment()
increment()
toggleTheme()
decrement()
reset()

Demonstrates a simple counter with theme toggling using Gambas variables and procedures.

Let’s Try →
2

Gambas Random Number Generator

FOR i = 1 TO 3
    PRINT "Random "; i; ": "; Rnd(1,100)
NEXT

Generates random numbers between 1 and 100 and prints them.

Let’s Try →
3

Gambas Todo List

DIM todos AS NEW Collection

PROCEDURE addTask(task AS String)
    todos.Add(task)
    FOR EACH t AS String IN todos
        PRINT t;
    NEXT
END PROCEDURE

PROCEDURE removeTask(index AS Integer)
    todos.RemoveAt(index)
    FOR EACH t AS String IN todos
        PRINT t;
    NEXT
END PROCEDURE

' Simulate actions
addTask("Buy milk")
addTask("Write Gambas code")
removeTask(0)

Maintains a simple todo list with add and remove functionality.

Let’s Try →
4

Gambas Dice Roller

FOR i = 1 TO 3
    PRINT "Roll "; i; ": "; Rnd(1,6)
NEXT

Rolls a six-sided dice three times.

Let’s Try →
5

Gambas Countdown Timer

DIM count AS INTEGER = 5
WHILE count >= 0
    PRINT "Countdown: "; count
    count -= 1
WEND
PRINT "Done!"

Counts down from 5 to 0.

Let’s Try →
6

Gambas Prime Checker

FUNCTION isPrime(n AS Integer) AS Boolean
    IF n < 2 THEN RETURN FALSE
    FOR i = 2 TO Sqr(n)
        IF n MOD i = 0 THEN RETURN FALSE
    NEXT
    RETURN TRUE
END FUNCTION

DIM nums AS INTEGER[] = [7,10,13]
FOR EACH n AS Integer IN nums
    PRINT n; " is "; IIF(isPrime(n), "Prime", "Not Prime")
NEXT

Checks if numbers are prime.

Let’s Try →
7

Gambas Temperature Converter

FUNCTION cToF(c AS Double) AS Double
    RETURN c * 9 / 5 + 32
END FUNCTION

FUNCTION fToC(f AS Double) AS Double
    RETURN (f - 32) * 5 / 9
END FUNCTION

PRINT "25°C = "; cToF(25); "°F"
PRINT "77°F = "; fToC(77); "°C"

Converts Celsius to Fahrenheit and Fahrenheit to Celsius.

Let’s Try →
8

Gambas Shopping Cart

DIM cart AS NEW Collection
DIM prices AS NEW Collection

PROCEDURE addItem(item AS String, price AS Integer)
    cart.Add(item)
    prices.Add(price)
    PRINT "Cart: "; cart
    PRINT "Total: "; prices.Sum
END PROCEDURE

PROCEDURE removeItem(index AS Integer)
    cart.RemoveAt(index)
    prices.RemoveAt(index)
    PRINT "Cart: "; cart
    PRINT "Total: "; prices.Sum
END PROCEDURE

' Simulate actions
addItem("Apple", 2)
addItem("Banana", 3)
removeItem(0)

Adds and removes items in a shopping cart with total cost.

Let’s Try →
9

Gambas Name Greeting

PROCEDURE greet(name AS String)
    PRINT "Hello, "; name; "! Welcome!"
END PROCEDURE

' Simulate actions
greet("Saurav")
greet("Alice")
greet("Bob")

Greets users by name.

Let’s Try →
10

Gambas Stopwatch

DIM time AS INTEGER = 0
WHILE time < 5
    PRINT "Stopwatch: "; time; " seconds"
    time += 1
WEND
PRINT "Done!"

Simulates a stopwatch incrementing seconds.

Let’s Try →

Frequently Asked Questions about Gambas

What is Gambas?

Gambas is a free, object-oriented programming language and development environment based on BASIC, designed primarily for Linux. It allows rapid development of graphical, database, and console applications, with a visual IDE similar to Visual Basic.

What are the primary use cases for Gambas?

Developing Linux GUI applications. Rapid prototyping for desktop software. Database applications with MySQL, PostgreSQL, or SQLite. Educational purposes for learning programming. Small utility and productivity tools on Linux

What are the strengths of Gambas?

Rapid development for Linux desktop applications. Intuitive syntax similar to Visual Basic. Built-in IDE with GUI designer. Supports modern object-oriented programming. Active open-source community with extensions

What are the limitations of Gambas?

Primarily Linux-focused, limited Windows/Mac support. Smaller ecosystem compared to mainstream languages. Less suitable for performance-critical applications. Limited industrial adoption. Relatively smaller community and documentation

How can I practice Gambas typing speed?

CodeSpeedTest offers 10+ real Gambas code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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