SELECT CASE
Purpose
The SELECT CASE statement is the first statement of a CASE construct. It provides a concise syntax for selecting, at most, one of a number of statement blocks for execution.
Syntax
Rules
When a SELECT CASE statement is executed, the case_expr is evaluated. The resulting value is called the case index, which is used for evaluating control flow within the case construct.
If the case_construct_name is specified, it must appear on the END CASE statement and optionally on any CASE statements within the construct.
The case_expr must not
be a typeless constant or a BYTE data object.
Examples
ZERO: SELECT CASE(N) ! start of CASE construct ZERO
CASE DEFAULT ZERO
OTHER: SELECT CASE(N) ! start of CASE construct OTHER
CASE(:-1)
SIGNUM = -1
CASE(1:) OTHER
SIGNUM = 1
END SELECT OTHER
CASE (0)
SIGNUM = 0
END SELECT ZERORelated information
- CASE construct
- CASE
- END (Construct), for details on the END SELECT statement
