Writing Algorithms- Flow Diagrams
Writing Algorithms- Flow Diagrams
Writing Algorithms - Flow Diagrams
Definition and Importance
- A flow diagram is a graphical way to describe a process or a system.
- It provides a visual representation of the sequence of steps taken to solve a problem.
- Flow diagrams are used in Computer Science to depict algorithms and show the flow of control from one operation to another.
Symbols and Structure
- Various symbols are used in flow diagrams, each with a different meaning.
- The oval represents the start or end point of an algorithm.
- A rectangle is used to denote a process or operation such as a calculation or assignment.
- The diamond stands for a decision point, with one path for ‘yes’ or ‘true’ and another for ‘no’ or ‘false’.
- The parallelogram is used for input and output tasks.
- Arrows are used to show the direction of flow.
Process of Creating Flow Diagrams
- Begin by fully understanding the problem. Define the problem, its inputs, processes, and expected output.
- Split the problem into smaller tasks or steps using decomposition.
- Draw your flow diagram step by step based on the tasks or steps, utilizing the appropriate symbols for each action.
- Check your flow diagram for possible errors or improvements.
Best Practices
- Make use of color for clarity and to differentiate between different types of operations.
- Keep the flow from top to bottom and left to right to maintain readability.
- Limit the number of decision points (diamonds) to minimize complexity.
- Keep your diagram balanced with respect to shape, flow, and spacing.
Benefits of Flow Diagrams
- Help with visualising the sequence of operations and the flow of control within an algorithm.
- Useful for explaining and demonstrating solutions to others.
- Can be verified for logical errors before implementation into a programming language.
- They improve understanding and communication of the algorithm.
Always use flow diagrams to visualise and design your algorithms. They are a powerful tool to enhance comprehension and to train your computational thinking skills in a visual and interactive way. Practice by creating flow diagrams for various tasks, and always review and edit your work.