Flowcharts: Visualizing an Algorithm
A flowchart is a graphical or diagrammatic representation of an algorithm. It uses a set of standard symbols connected by arrows to illustrate the step-by-step sequence of operations and the flow of control required to solve a problem. It's an excellent tool for planning, documenting, and visually debugging program logic.
· Advantages: Provides a clear, easy-to-follow visual map of the program's logic and is independent of any specific programming language.
· Disadvantages: Can be time-consuming to draw and difficult to modify for complex algorithms without redrawing.
Standard Flowchart Symbols
Understanding the standard symbols is key to creating and reading flowcharts. Each shape represents a different type of action or step.
|
Name |
Function |
|
Terminal |
Represents the Start or End point of the algorithm. |
|
Input / Output |
Represents an action of getting data (input) or displaying data (output). |
|
Process |
Represents a calculation, data manipulation, or any processing step. |
|
Decision |
Represents a point where a yes/no or true/false decision is made, which then branches the flow. |
|
Flow Line |
An arrow that connects symbols and indicates the direction of the logical flow. |
|
Connector |
Used to connect separate parts of a flowchart, often to avoid crossing flow lines. |