The Decision Table IF statement
A decision table IF statement selects among more than two alternatives. This form of IF statement avoids deep nesting. Usually, each control_expression tests the same variable against different constant values.
IF control_expression_1
A first set of one or more statements
ELSE IF control_expression_2
A second set of one or more statements
ELSE IF control_expression_3
A third set of one or more statements
ELSE
A final set of one or more statements
ENDIF