SS2 Third Term Computer Studies Lesson Note – Algorithms and Flow Chart II

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WEEK: 5                              

TOPIC: ALGORITHMS AND FLOW CHART (II)

CONTENT: ­ (a) Writing algorithm (b) Flowchart symbols (c) Use of Flowchart (d) Flowchart diagrams for solving a given program

Sub-Topic 1: Writing Algorithm

Example 1: Compute the average of a given set of numbers, N

Solution: 

1. Input “count the numbers in the set”: N
2. C =1// use to count the numbers processed
3. Sum=0
4. If c>N :go to line 9
5. Input next number; num
6. Sum=sum + num
7. C=c + 1
8. Go to line 4
9. Average= sum/Nn
10. Write the value of average
11.  Stop

Example 2: Evaluate the equation y=a (b-c)2/d+2

Solution: 

1. Input values for a, b, c, d
2. Y=a*(b-c)^2/(d+2)
3. Write the value of y

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