Changes

:- ^ for power

:- ^ for power

:- logical operators (&& for "and", || for "or") where the operands can be booleans or numbers (0 is false, any non-zero is true) and the boolean result is converted to number (there is no "not" operator but there is a not() function shown in the list of available functions)

:- logical operators (&& for "and", || for "or") where the operands can be booleans or numbers (0 is false, any non-zero is true) and the boolean result is converted to number (there is no "not" operator but there is a not() function shown in the list of available functions)

:-  comparisons between numbers (<= < == != > >=) where again the boolean result is converted to number

:-  comparisons between numbers (< = != >) where again the boolean result is converted to number