Basic Compiler

Create, debug, share and run Basic code online.

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Online Basic Compiler Features

The Original Beginner's Language

  • Experience BASIC (Beginner's All-purpose Symbolic Instruction Code)—designed to teach programming
  • Write readable code with PRINT, INPUT, IF, and FOR commands that explain themselves
  • Understand why BASIC introduced more people to programming than any other language
  • Perfect for absolute beginners learning programming logic without syntax complexity

Retro Computing Nostalgia

  • Relive the home computer era with line-numbered programming on Commodore 64, Apple II style
  • Practice GOTO, GOSUB, and RETURN—commands that shaped early software development
  • Test text-based games and programs like those in 1980s computer magazines
  • Ideal for retrocomputing enthusiasts exploring computing history through working code

Simple but Complete

  • Use FOR...NEXT loops for iteration, IF...THEN for decisions in this basic online editor
  • Practice string manipulation with $ variables and numeric computation with simple operators
  • Experience immediate-mode programming—type commands and see instant results
  • Great for teaching kids or adults new to programming with minimal cognitive overhead

No Emulator Required

  • Run authentic BASIC code without vintage computers or emulators in this basic playground
  • Share BASIC programs for educational tutorials, retro gaming nostalgia, or teaching examples
  • Perfect for demonstrating how programming looked before modern IDEs and frameworks
  • Test classic algorithms and text adventures with line-numbered, procedural programming
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Basic Keyboard Shortcuts

Shortcut Action Description
Ctrl + Enter Run BASIC Execute BASIC program via bwBASIC interpreter
Ctrl + S Share Program Generate permanent URL for your BASIC code
Ctrl + / Comment Toggle REM comment lines in BASIC
Ctrl + D Duplicate Line Copy current line
Ctrl + F Find Search through BASIC source code

Pro Tips

  • Start line numbers at 10 and increment by 10 for easier insertion later
  • Use PRINT for output and INPUT for reading user input
  • Practice FOR I = 1 TO 10 loops for iteration
  • Share BASIC programs for teaching or retro gaming nostalgia

Experience the power of Replit AI

This entire Basic compiler was built by Replit Agent 3 from a natural language prompt. Replit's environment facilitates rapid development, iteration and testing code for users of any technical ability. Develop software faster and better with Replit’s autonomous AI.

This entire Basic compiler was built by Replit Agent 3 from a natural language prompt. Replit's environment facilitates rapid development, iteration and testing code for users of any technical ability. Develop software faster and better with Replit’s autonomous AI.

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Frequently Asked Questions

What version of BASIC does this compiler support?

This online basic compiler uses Bywater BASIC, which supports classic BASIC syntax including line numbers, GOTO, GOSUB, FOR/NEXT loops, IF/THEN statements, PRINT, and INPUT. You get authentic vintage BASIC programming experience without needing retro hardware.

Can I create games in BASIC?

Absolutely! BASIC was THE language for early computer games. This basic playground lets you create text adventures, number guessing games, and simple simulations using PRINT, INPUT, IF/THEN, and loops. Many famous games started as BASIC programs in the 1980s.

Is BASIC good for learning programming?

Yes! BASIC was designed specifically for teaching programming. The simple English-like syntax (PRINT, INPUT, FOR, NEXT) makes concepts clear without overwhelming beginners. This basic online editor provides the classic learning experience that introduced millions to coding in the 1970s-1990s.

Why use line numbers in BASIC?

Line numbers let you reference specific lines with GOTO and GOSUB commands. They also determine execution order. While modern languages don't use line numbers, they're part of BASIC's charm and history. This basic compiler preserves authentic vintage programming style.

Can I save BASIC programs permanently?

Yes! Click Share to generate a permanent URL for your BASIC program. Perfect for preserving retro computing nostalgia, sharing educational examples, or building a portfolio of vintage-style programs. Your BASIC code stays accessible indefinitely.

What BASIC features work in this online compiler?

Core BASIC features work great: line numbers, PRINT output, INPUT for user input, IF/THEN conditionals, FOR/NEXT loops, GOTO/GOSUB control flow, numeric and string variables with $, and REM comments. Full classic BASIC programming in this basic code runner.

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Basic Keyboard Shortcuts
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