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More examples of programs with procedures. Making decisions. In Pascal there are two types of statements that enable the computer to make decisions. IF-THEN-ELSE CASE. IF-THEN (ELSE to be discussed later). IF (Boolean expression) THEN STATEMENT ;

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making decisions
Making decisions
  • In Pascal there are two types of statements that enable the computer to make decisions.
    • IF-THEN-ELSE
    • CASE
if then else to be discussed later
IF-THEN (ELSE to be discussed later)

IF (Boolean expression) THENSTATEMENT;

  • The compiler will evaluate the Boolean expression. If it is TRUE then the STATEMENT is executed. If it is FALSE then the STATEMENT is skipped.
comparison expressions
Comparison expressions
  • = Equal to
  • <> Not equal to
  • < Less than
  • > Greater than
  • >= Greater than or equal
  • <= Less than or equal
if then else
IF-THEN-ELSE

IF (Boolean expression) THENSTATEMENT1

ELSE

STATEMENT2;

  • The compiler will evaluate the Boolean expression. If it is TRUE then STATEMENT1 is executed. If it is FALSE then STATEMENT2 is executed.
  • Note: no semicolon after STATEMENT1.
for tuesday
For Tuesday
  • Reminder: HW #5 is due
    • IT is on the web - Marateck’s HW #4
  • Read sections 7.1-7.6 and 7.7-7.12
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