Page 165 - Computer

school who wants to reward students represented as shown in Figure 8.11.
who attain an average mark above 80%.
Figure 8.10 shows an example of a flow
chart for rewarding students. True Condition False Computer Science
FOR ONLINE READING ONLY
Start

Statement 1 Statement 2
Enter Marks

No
Marks >80 ?
Figure 8.11: Example of IF-THEN-ELSE
Yes selection

Display "Reward a Student" When the IF-THEN-ELSE structure is
encountered:
(i) The condition used to make the
decision is tested.
End (ii) If the condition is true,
the statements between IF
Figure 8.10: Flow chart for rewarding students
and THEN are executed.
The ELSE part is skipped, and
IF…THEN…. ELSE execution continues with the
In this structure, the condition is true, if it statement following ENDIF.
executes statement 1. If the condition is (iii) If the condition is false, the
false, it will execute the second process THEN part is skipped. Instead,
(statement 2). In this case, process 1 or 2 the statements between ELSE
will only be implemented depending on and ENDIF (i.e., the ELSE part
the given condition. The syntax of IF… of the structure) are executed,
and execution continues with the
THEN…ELSE is shown as follows:
statement after ENDIF.
IF (condition) THEN

Statement 1 Example of IF-THEN-ELSE selection
control structure
ELSE
Write an algorithm using a flowchart that
Statement 2 reads two scores of a student, determines

ENDIF; the largest score, and print the largest
score with the message that identifies it.
The corresponding flowchart is Algorithm: Determining the largest score

157
Student’s Book Form One