How to Calculating the area of circle using Python

How to Calculating the area of a circle using Python:-

The area of the circle is the number of square units inside the circle, can be calculated using the radius and diameter. The formula for evaluating the area of a circle is

Area of circle using radius= Pi*r*r ( r is the radius of the circle)

Area of the circle using diameter= 1/4*Pi*d*d ( d is the diameter of the circle)

Pi is a Greek letter and the value of Pi is equal to 3.14159265359. In the program, we will be initiating Pi as a global variable or we can simply import from the math module present in python. The syntax for importing pi from math module: from import math.

ALGORITHMS:-

1.Input radius/diameter.

2.Calculate the area of a circle using the formula.

area= pi*r*r(if radius is given as input).

area=(pi*d*d)/4 (if diameter is given as input).

3.Print area.

CODE: -

radius= int(input("Enter radius of the circle:\n"))
area=3.14*radius**2
print("Area of circle:{0:.2f}".format(area))
OUTPUT:-                  
                              

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