Which flow diagram shape is used to represent inputs and outputs?

The shape used to represent inputs and outputs in a flow diagram is the parallelogram. This geometric figure indicates processes where data is received or sent, such as user inputs or system outputs. In flowcharting, using a parallelogram helps clearly distinguish input/output operations from other processes, represented by rectangles, and decision points, represented by diamonds. This clarity is essential for anyone reading the flowchart, as it allows them to quickly understand which steps involve data entry or results output, thus enhancing overall comprehension of the system's operations.