Learn QBASIC with Real Code Examples

Create a simple number guessing game

Write a calculator for arithmetic operations

Draw geometric shapes using graphics commands

Read and write text files

Develop menu-driven programs with subroutines

Check syntax for missing END, THEN, or NEXT

Verify variable types match usage

Ensure loops terminate correctly

Use CLS to clear screen for clean output

Debug with PRINT statements or LIST command

Run programs frequently in IDE to verify behavior

Check variable outputs with PRINT statements

Validate loops and conditional logic

Test file I/O operations on sample files

Check graphics output for correct positioning

Run directly in DOS environment

Use DOSBox for modern systems

Compile to EXE for DOS execution

Share BAS source files for educational purposes

No cloud or web deployment support

QBasic IDE and interpreter

DOS or DOSBox emulator

QB.EXE compiler for EXE output

External text editors (optional)

Simple graphics and sound commands built-in

Reads and writes text files

Basic DOS system interaction

Interoperates with QB libraries (.BAS subroutines)

Minimal external library support

Used alongside DOS utilities for file management

Use subroutines to reduce code repetition

Test frequently with small program chunks

Organize code logically with comments

Use arrays for structured data

Keep programs simple and clear

Limited modern resources

No object-oriented support

No internet or network libraries

Debugging is manual in IDE

Graphical capabilities are minimal