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#include <iostream>#include <cmath>using namespace std; // Added for convenienceint main() { double radius; const double PI = 3.14159265359; // Prompt user for radius cout << "Enter the radius of the circle: "; cin >> radius; // Calculate and display the area double area = PI * pow(radius, 2); cout << "Area of the circle: " << area << endl; return 0;}Discuss the variable display

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