7.4 - Variables and Constants
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Practice Questions
Test your understanding with targeted questions
Define what a variable is.
💡 Hint: Think about a box that can hold different items.
What is the main purpose of a constant?
💡 Hint: Consider where you would use a number that never changes, like π.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a variable?
💡 Hint: Think about the flexibility of values in a program.
True or False: Constants can be changed during program execution.
💡 Hint: Reflect on the definition of constants.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Write a program snippet that uses both variables and constants to calculate the area of a circle, considering the radius as user input.
💡 Hint: Think about the formula for area = πr² and how to implement it in code.
Create a scenario where mistakenly changing a constant would lead to an error. Then, explain how that error could impact the program.
💡 Hint: Reflect on situations that involve limits, like user registrations or rates.
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