#!python3

"""
Create a function that determines the area of a circle if given the radius
1 input parameter
float: radius
return: float area for the circle
note: Area of a circle is given by A = pi*(square of the radius)
You may want to use the math module to complete this problem
"""
import math

def area(a):
    f = math.pi * (a**2)
    return f

print(round(area(2),2))
assert round(area(2),2) == 12.57