When designing a flow-chart for a program that asks the user for their age and outputs whether they are eligible to vote (voting age is 18), which of these symbols would best represent the step where the program makes a decision to determine eligibility?
The diamond shape in flow-charts represents a decision point where the flow can branch based on a yes/no question or true/false condition. In this scenario, the program needs to decide if the user's age is 18 or over to determine voting eligibility. The rectangle represents a process step, not a decision, and the oval symbol is used to denote the start or end of the flow-chart, not a decision point. The parallelogram is used for input/output operations.
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Why is the diamond shape specifically used for decisions in flow-charts?
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What other shapes are commonly used in flow-charts and what do they represent?