Pascal - Decision Making

Decision making structures require that the programmer specify one or more conditions to be evaluated or tested by the program, along with a statement or statements to be executed if the condition is determined to be true, and optionally, other statements to be executed if the condition is determined to be false.

Following is the general form of a typical decision making structure found in most of the programming languages −
Pascal programming language provides the following types of decision making statements. Click the following links to check their detail.

Statement	Description
if - then statement	An if - then statement consists of a boolean expression followed by one or more statements.
If-then-else statement	An if - then statement can be followed by an optional else statement, which executes when the boolean expression is false.
nested if statements	You can use one if or else if statement inside another if or else if statement(s).
case statement	A case statement allows a variable to be tested for equality against a list of values.
case - else statement	It is similar to the if-then-else statement. Here, an else term follows the case statement.
nested case statements	You can use one case statement inside another case statement(s).