QBASIC Editor

Purpose: provide a dedicated QBASIC editor and runtime so users can write line-numbered QBASIC programs, execute them, and view outputs in a safe sandbox. The execution model follows classic QBASIC semantics: statements are interpreted in sequence by line number, with support for FOR/NEXT, DO/LOOP, IF/THEN, GOTO, GOSUB/RETURN, and common I/O. This setup enables learners to experiment with loops, conditionals, arrays, and string operations without installing legacy software.
Conceptually it offers an isolated runtime where memory, CPU time, and I/O are sandboxed, and where syntax or runtime errors are highlighted with a precise line reference.
Who benefits: students in introductory programming courses, hobbyists reviving retro computing, and educators seeking a hands-on QBASIC learning tool. Unique value: a browser-based QBASIC environment that preserves classic syntax, provides an integrated transcript of inputs and outputs, supports step-by-step debugging, and enforces resource limits to prevent runaway programs.
Core features: editable, line-numbered code area; a sandboxed interpreter; support for INPUT/PRINT and standard control structures; basic error reporting with line numbers; run vs. step modes; and optional I/O simulation for programmatic testing. Use cases include drafting tutorials, practicing algorithm design, implementing simple games, and validating logic against classroom exercises. Advanced capabilities: export/import of programs and transcripts, predefined sample libraries, and configurable limits to tailor difficulty and safety.