/ GENTLE PRIMER
/ Control Structures
The Conditional Statement
A frequent case is that, if a certain condition holds, a specific action
should be initiated, otherwise nothing should happen.
This could be expressed by an alternative statement
with an empty second alternative.
(| IsBad(Item) Complain(Item) || /*nothing*/ |)This can be abbreviated by a conditional statement.
[| IsBad(Item) Complain(Item) |]An alternative statement has the form
A conditional statement cannot define variables because if one member fails its conceptual empty second case is taken which defines no variables.