BBC BASIC Programmers' Reference

(Articles about the editor and compiler have been moved to Program Editor and IDE)

• Alternative comment styles
• Alternative FOR NEXT behaviour
• Detokenising tokenised code
• Discovering how a program was run
• Finding the BBC BASIC installation directory
• Finding saved BASIC file format
• Finding the version number
• Fitting programs in the demo version
• How to avoid GOTOs
• Notes for RISC OS users
• Object Orientated programming
• Running a BAS file from the command line
• Simulating CONTINUE
• Simulating RESUME and RESUME NEXT
• Using the tokeniser

• Memory usage monitor
• Getting the current line number
• Listing the line an error occurs in ON ERROR
• Pausing under program control

• Cascaded error handling
• Cascaded ON CLOSE handling
• Displaying program errors in a message box
• Simulating RESUME and RESUME NEXT
• Structured Exception Handling
• Verbose error messages

• Converting Binary Coded Decimal
• Finding the parity of a number
• Handling unsigned 32-bit values
• High Quality Random Number Generation
• Hyperbolic functions
• Modulo integer arithmetic
• Non-integer modulo operation
• Notes on the use of RND
• Number conversion in BASIC
• Rounding functions
• Short-circuit evaluation
• Simplifying arithmetic using strings
• The ATAN2 function
• Using 16-bit floating point values
• Using 32-bit floating point values

• Changing the case of a string
• Counting the characters in a Unicode string
• Data without DATA
• Reversing a string
• Sorting the characters in a string
• Substituting characters in a string
• Using regular expressions

• Aligning structures
• Allocating arrays using the Windows API
• Allocating and freeing memory blocks
• Avoiding resource leaks
• Clearing the contents of a structure
• Creating an array alias
• Deconstructing arrays
• Emulating the C assignment function
• Fast variables
• Finding the modulus of part of an array
• Finding the size of an array in a structure
• Forcing a variable to exist
• Handling unsigned 32-bit values
• Interpreter internal variables
• Memory usage monitor
• Passing array and structure parameters
• Passing substructures to procedures
• Pseudo-variable side effects
• Re-dimensioning arrays
• Reading and writing arrays in files
• Returning an array from a function
• Searching ordered lists
• Sharing PRIVATE variables
• Simulating a union
• Sorting the characters in a string
• Sub-structure arrays
• Summing part of an array
• Using 16-bit floating point values
• Using 32-bit floating point values
• Whole-array operations in structures
• Writing to VDU variables