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A variable stores a value that may change. A constant names a value that does not change while the program runs. Naming a fixed price or limit makes its purpose clear and avoids repeating unexplained numbers.
CONSTANT TicketPrice = 7
DECLARE Tickets : INTEGER
INPUT Tickets
OUTPUT TicketPrice * TicketsWorked example
For three tickets, the expression is 7 × 3 = 21. The number of tickets is input and may differ next time; TicketPrice stays fixed in this program. Changing the price in one declaration is easier to maintain than finding many occurrences of 7.
Do not write INPUT TicketPrice: input belongs in a variable. Scope—where an identifier can be used—is taught with procedures and functions, after you have seen those constructs.
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Independent Practice: A fixed ticket price
Each ticket costs 7 units. Read the integer number of tickets and output the total price. Represent the fixed price with a named constant.
Write a complete program. Read inputs in the stated order. Output only the requested results, one per line, without input prompts. Test with your own values before submitting.
Interactive exercises for Module 2 and beyond require an active plan.
Run code to inspect step-by-step variable trace states.