BBj Object Operators

Description

All of the operators that work with numbers and strings also work with object expressions. Both sides of the operation must evaluate to the same type (string, number or object). For example, this is a runtime error:

>LET A!="123",B!=123
>IF A!=B! THEN PRINT "EQUAL"
!ERROR=26 (Undefined operation: STRING = NUMBER)

The following table lists the meaning of each operator for number, string and object expressions:

Operator	STRING	NUMBER	OBJECT
+	Concatenation	Addition	Error
=	String comparison	Numeric comparison at the current precision	A!.equals(B!)
<>	String comparison	Numeric comparison at the current precision	!(A!.equals(B!))
<=, >=, >, <	String comparison	Numeric comparison at the current precision	Error
-, *, /, ^	Error	Ok	Error
AND, OR	Error	Ok	Error
Unary !, -, +	Error	Ok	Error

Note #1: An Error indicates an illegal operation.

Note #2: It is legal to compare a string to null().

BBj Object Operators

Description

See Also