CASE IS - QB64Official/qb64 GitHub Wiki
See SELECT CASE.
CASE IS can be used in a SELECT CASE routine where you need to use relational conditional expressions.
- AND (boolean) can be used to add extra conditions to a CASE IS statement evaluation.
- OR (boolean) can be used to add alternate conditions to a CASE IS statement evaluation.
- Parenthesis are allowed in CASE IS statements to clarify an evaluation.
- CASE IS > 100 uses the greater than expression.
- CASE IS <= 100 uses the less than or equal to expression.
- CASE IS <> 100 uses the not equal to expression(same as NOT 100).
Relational Operators:
| Symbol | Condition | Example Usage |
|---|---|---|
| = | Equal | IF a = b THEN |
| <> | NOT equal | IF a <> b THEN |
| < | Less than | IF a < b THEN |
| > | Greater than | IF a > b THEN |
| <= | Less than or equal | IF a <= b THEN |
| >= | Greater than or equal | IF a >= b THEN |