ALGORITHMS AND FLOWCHART

CONTENT

1. Writing an Algorithm
2. Flowchart Symbols and their Uses
3. Use of Flowchart
4. 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

1. 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.