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CodingBat code practice > getCircumference
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Find the circumference of the circle, input is the radius of a circle. Use 3.14d for pi.

getCircumference(1.0) → 6.28
getCircumference(2.0) → 12.56
getCircumference(3.0) → 18.84

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public double getCircumference( double radius) { }

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