Define a class named Circle which can be constructed by a radius

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Question:

Define a class named Circle which can be constructed by a radius. The Circle class has a method that can compute the area.

Hints:

  • Use def methodName(self) to define a method.

Solution:

class Circle(object):
    def __init__(self, r):
        self.radius = r

    def area(self):
        return self.radius**2*3.14

aCircle = Circle(2)
print aCircle.area()

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