List of expression elements / Comparison operators |
The != operator checks for non-equality of two expressions or for two record variables.
expr != expr
record1.* != record2.*
The != operator evaluates whether two expressions or two records are different.
A less-than sign followed by a greater-than sign (<>) can be used as an alias for the != operator.
When comparing expressions with the first syntax, the result of the operator is FALSE when one of the operands is NULL. This syntax applies to most data types except complex types like BYTE and TEXT.
When comparing two records with the second syntax, the runtime system compares all corresponding members of the records. If one pair of members are different, the result of the operator is TRUE. When two corresponding members are NULL, they are considered as equal. This second syntax allows you to compare all members of records, but records must have the same structure.
MAIN DEFINE n INTEGER LET n==512 IF n!=32 THEN DISPLAY "The variable is not equal to 32." END IF END MAIN