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C++ program to calculate circle circumference

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Following program shows you how to calculate circle circumference. In this program we get circle radius from user and calculate circumference using following formula Circumference = 2 X PI X r

#include <iostream>
#include <math.h>

int main() {
	float circleRadius;

	std::cout << "Please enter the radius of circle:";
	std::cin >> circleRadius;

	float circumferenceOfCircle = 2 * 3.14 * circleRadius;

	std::cout << "Circumference of circle is: " << circumferenceOfCircle;
}

Output:

Please enter the radius of circle: 8
Circumference of circle is: 50.24 
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