In a flow diagram, which shape is used for inputs and outputs?

In a flow diagram, the shape used for inputs and outputs is a parallelogram. This is because the design of flow diagrams utilizes specific geometric shapes to represent different types of actions or processes. The parallelogram specifically indicates where data is input into the system or output from it, making it immediately recognizable as part of the data flow process.

Using this shape helps anyone reading the diagram to quickly identify what information is being processed or produced, thus enhancing clarity. In contrast, other shapes have different meanings: rectangles typically represent processes, diamonds denote decisions or branching points, and circles are generally used for connectors that link various parts of the diagram. This symbolism allows for better understanding of the flow and structure of the algorithm or system being depicted.