Constants

Constants are logical, numeric, and string values.


Processing outcomes

  • ok if it was done correctly
  • nok if not done correctly
  • null if no results returned
  • data if logical, numeric or string data returned


Logical constants

Logical constants are used to represent falsity and truth:

  • false
  • true

Number 0 (zero) or void string '' are false.


Integer constants

Integer constants are: ..., -2, -1, 0, +1, +2,... (+ can be omitted).


Floating point constants

Floating point constants are, for example: -3.84, 3.14, +12.5 (2-digit approximation).


String constants

String constants are sequences of characters delimited by:

  • ' (single quote)
  • " (double quote)

or terminated by:

  • end line (CR + LF)
  • , (Command Separator)
  • ] (compound end command).