Algorithm

1. 1

2. 2

3. 3

4. 1 4

5. 5
At the end of the lesson, learners will be able to explain:
Structure of a program
Computer program development steps
Algorithm and its characteristics
Flowcharts and different symbols for flowchart

6. Program structure
Input Process Output

7. 7
Program structure
Input Number1, Number2
Total= Number1+Number2
Average=Total/2
Print Average
End
Output
Input
Process

8. 1
8
Problem Analysis
Program Design
Program Coding
Program Development
Program Maintenance
Program Development Steps

9. 9
Algorithm
Definition
Characteristics

10. 10
Algorithm
Step1: Ask Buyer Name and Address
Step2: Ask Product Name, Unit price, Total quantity
Step3: Price of the Product=Unite Price X Quantity
Step4: Calculate Vat of the product
Step5: Total price=Price of the product + Vat
Step6: Print Buyer Name, Address, Product Name, Unit price,
Total quantity
Step7: Print Total Vat
Step8: Print Total Price
Step9: Stop

11. 11
Program structure
Input Number1, Number2
Total= Number1+Number2
Average=Total/2
Print Average
End
Avg: 6

12. 12
Flowchart
Definition
Characteristics

13. 1 13
Some Symbols of Flowchart

14. 1 14
Start
Process
Decision
End
Data
Document

15. 1
Start
A > B
Read A, B
A B
End

16. 1 16
Group Work
Group A: Write an algorithm to find out the average of 6
subjects and show pass or fail based on average mark.
Pass >= 40, Fail < 40
Group B: Draw a flowchart to show the highest and the
lowest number among three numbers. Advantage of
different topology.

17. 1 17
Evaluation
1. What do you mean by Algorithm ?
2. What steps are involved in program development?
3. What do you mean by Flowchart?

18. 1 18
Home Work
1. Write down the characteristics of
Algorithm?
2. Why algorithm and flowchart is needed in
program development?
3. Write an algorithm to find out the area of a circle.

19. 1 19
Message
In order to make appropriate decisions
a person has to be able to
consider and deliberate
about the consequences of her actions.

20. 1 20