**ALGORITHMS AND FLOWCHART**

CONTENT

- Writing an Algorithm
- Flowchart Symbols and their Uses
- Use of Flowchart
- Flowchart Diagrams for Solving a Given Program

** **

**Writing an Algorithm**

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

**Solution: **

(i) Input “count the numbers in the set”: N

(ii) C = 1// used to count the numbers processed

(iii) Sum = 0

(iv) If c>N :go to line 9

(v) Input next number; num

(vi) Sum=sum + num

(vii) C = c + 1

(viii) Go to line 4

(ix) Average = sum/Nn

(x) Write the value of average

(xi) Stop

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

**Solution: **

(i) Input values for a, b, c, d

(ii) Y = a*(b-c)^2/(d+2)

(iii) Write the value of y

** **

**Example 3: **Print out the first ten odd numbers

**Solution: **

(i) C = 1 //use to count the numbers processed

(ii) Sum = 0 //use to sum of number

(iii) Odd = 1 // first odd number

(iv) Sum = Sum+odd

(v) Odd = odd+2

(vi) C = C+1

(vii) If C>10; go to line 9

(viii) GOTO 5

(ix) Print odd

(x) Stop

**EVALUATION **

- Write a pseudo-code for printing out the first fifteen even numbers

**Flowchart Symbols and their Uses**

A** flowchart **is a pictorial representation in which symbols are used to show the various operations and decisions to be followed in solving a given problem.

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