Features Currently Implemented in Production BASIC

This is a short list of features currently available, and reasonably stable, for use in Production BASIC applications.

• Loading and saving programs built in Reverse Polish Notation.
• Most general BASIC language features implemented:
  • IF/THEN/ELSE testing.
  • GOSUB/RETURNs
  • FOR/NEXT/STEP loops
  • GOTO jumping
  • WHILE/WEND loops
  • other commonly used BASIC verbs (PRINT, INPUT, LET, etc.)
• Strong substring and string operation mechanism.
• Many standard Business Basic terminal mnemonics implemented.
• User-defined program escape trapping (ESCON/ESCOFF/SETESC).
• Record operations on INDEXED and TEXT external file types.
• Accurate floating point numbers handled internally (don't use normal C floats or doubles).
• User-defined internal functions (DEF FN).
• Public programs with and without parameter lists (CALL/ENTER/EXIT).
• 43 internal functions, 50 terminal mnemonics, 12 system variables, 41 verbs
• Modular design and strong runtime engine which make it easy to add new internal commands or functions.



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