OODP101_Week4.pptx - Object Oriented Design and Programming...

Object Oriented Design and Programming
Week 4
A B Emran Salahuddin (Sydney)
Manzur Ashraf (Melbourne)
Kent Institute Australia Pty. Ltd .
ABN 49 003 577 302 CRICOS Code: 00161E
RTO Code: 90458 TEQSA Provider Number: PRV12051
Version 2 – 18
th
December 2015

SLIDE TITLE
Farrell, J. (2017) Programming Logic
and Design, Comprehensive (9th ed.)
Cengage Learning
2

Programming Logic and Design
Ninth Edition
Chapter 5
Understanding Programming Structures
3 Programming Logic and Design, Ninth Edition

Objectives
•
Programming Structure-Looping

While loop

Do-while loop

For loop

Combination of programming structures

Understanding the Reasons for Structure
4 Programming Logic and Design, Ninth Edition

The Loop Structure
•
Loop structure
•
Repeats a set of actions while a condition remains true
•
Loop body
•
Also called repetition or iteration
•
Condition is tested first in the most common form of loop
•
The while…do or while loop or for loop
5 Programming Logic and Design, Ninth Edition

The Loop Structure
(continued -2)
•
Loop structure
while testCondition continues to be true
do someProcess
endwhile
while you continue to be hungry
take another bite of food
determine if you still feel hungry
endwhile
6 Programming Logic and Design, Ninth Edition

The Loop Structure
(continued -3)
while loop
•
Ask a question and, depending on the answer, you might or
might not enter the loop to execute the loop’s procedure.
•
A while loop is also called a pretest loop because a condition
is tested before entering the loop even once.
7 Programming Logic and Design, Ninth Edition

The Loop Structure
(continued -4)
while loop
•
The important point to note when using while loop:
•
Use increment or decrement statement inside while loop
•
Loop variable gets changed on each iteration
• And at some point condition returns false
•
This way we can end the execution of while loop otherwise the loop
would execute indefinitely.