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JSS2: COMPUTER STUDIES - 1ST TERM

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  1. Computer Software | Week 1
    4 Topics
    |
    1 Quiz
  2. Operating System | Week 2
    9 Topics
    |
    1 Quiz
  3. Computer Memory: Primary And Secondary Memory | Week 3
    5 Topics
    |
    1 Quiz
  4. Computer Memory II: Secondary Memory (Backing Storage) | Week 4
    2 Topics
    |
    1 Quiz
  5. Number System I | Week 5
    4 Topics
    |
    1 Quiz
  6. Number System II | Week 6
    3 Topics
    |
    1 Quiz
  7. Units of Storage In Computer | Week 7
    2 Topics
    |
    1 Quiz
  8. Problem Solving Skills With Computer | Week 8
    5 Topics
    |
    1 Quiz
  9. Computer Programming Languages | Week 9
    3 Topics
    |
    1 Quiz
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Topic Content:

  • Meaning of Flow Chart
  • Flow Chart Symbols
  • Flow Chart Example

What is a Flow Chart?

A flow chart is a diagrammatic representation of an algorithm, that is, it is a visual picture, which gives the steps of an algorithm, and also the flow of control between the various steps.

It is a diagram or map showing the steps taken to reach a certain result. It can show how information moves from one part of a computer system to another.

A flowchart is a type of diagram that represents an algorithm, or process, showing the steps as boxes of various kinds, and their order by connecting them with arrows. In other words, a flow chart contains boxes of different shapes, connected by lines (or arrows)

The two most common types of boxes in a flowchart are the processing step, usually called activity and denoted as a rectangular box, and the decision step usually denoted as a diamond.

Flow Chart Symbols:

SymbolName Function
Screenshot 2023 08 14 at 16.12.30Start/EndAn oval represents
a start or end point
Screenshot 2023 08 14 at 16.45.53ArrowShows relationships
between shapes
Screenshot 2023 08 14 at 16.15.45Input/OutputA parallelogram
represents
input/output
Screenshot 2023 08 14 at 16.18.15ProcessProcessing step denoted
as a rectangle
Screenshot 2023 08 14 at 16.22.01DecisionDecision step denoted
as a diamond or rhombus

Activity:

Create a flow chart to prepare white rice from the algorithm in the previous topic.

  1. Start.
  2. Light the stove or gas cooker.
  3. Place a clean pot on it.
  4. Put a desired quantity of water in it.
  5. Check if the water is boiling, if yes, go to step 6 Otherwise, repeat step 4 until the water is boiling.
  6. Pour washed rice into the pot.
  7. Boil it until you are satisfied.
  8. Stop/End.

flowchart 6
A flowchart to prepare white rice.