programming-for-dummies

582
Branching Statements
One problem with the IF-THEN statement is that it only gives you two possible
choices. To offer multiple choices, Pascal also uses the CASE statement,
such as
CASE variable OF
value1: BEGIN
Commands;
END;
value2: BEGIN
Commands;
END;
END;
The preceding CASE statement is equivalent to the following IF-THEN-ELSE
statement:
IF variable = value1 THEN
BEGIN
Command
END;
ELSE
IF variable = value2 THEN
BEGIN
Commands;
END;
END;
To check if a variable matches multiple values, you can separate multiple
values with commas or you can match a range of values, such as
CASE variable OF
value1: BEGIN
Commands;
END;
Value2..value4: BEGIN
Commands;
END;
END;
The preceding CASE statement is equivalent to the following IF-
THEN-ELSEIF statement:
IF variable = value1 THEN
BEGIN
Commands;
END
ELSE IF (variable >= value2) AND (variable