In flowcharts, the symbol used for both input and output is the parallelogram.
Here’s a quick summary of some common flowchart symbols:
Oval (Terminator): Represents the start or end of a process.
Rectangle (Process): Represents a step in the process.
Parallelogram (Input/Output): Represents data input or output.
Diamond (Decision): Represents a decision point.
The parallelogram symbol is typically labeled with the specific input or output action being represented.