elseif — Conditional statement with alternative.
elseif( : : Condition : )
elseif is a conditional statement that continues after an
if or another elseif block with an alternative block.
The Condition parameter must evaluate to a Boolean or integer
expression.
If Condition evaluates to 'true' (not 0), the
following block body up to the next corresponding block statement
elseif, else, or endif is executed.
Reaching the end of the block the execution continues after the
corresponding endif statement.
If Condition evaluates to 'false' (0), the
execution is continued at the next corresponding block statement
elseif, else, or endif.
Condition (input_control) integer → (integer)
Condition for the if statement.
Default value: 1
If the condition is correct
elseif (as operator) returns TRUE. Otherwise, an
exception is raised and an error code returned.
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