# Calculating the area of circle using Python

## How to find area of circle using python ?

Here, in this page we will discuss the progrm to find area of circle using python .Area of 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 circle is

• Area of circle using radius=   Pi*r*r    ( r is the radius of circle)
• Area of circle using diameter=  1/4*Pi*d*d   ( d is the diameter of circle) ## Algorithm

• import pi from math
• Set r = 3
• Set are = pi*r*r
• Print(area)

### Code in Python

Run
```from math import pi
r=3.00
area=pi*r*r
print("The area of circle is",end=" ")
print(area)```
```Output :
The area of circle is 28.27```

## Using Diameter

• import pi from math
• Set d = 3
• Set area = (pi*d*d)/4
• Print(area)

### Code in Python

Run
```from math import pi
d=6.00
area=(pi*d*d)/4
print("The area of circle is",end="")
print(area)```
```Output :
The area of circle is 28.27``` ### One comment on “Calculating the area of circle using Python”

• Ganesh

# Easy to understand
r = int(input(‘enter the radius of a circle:’))
g = 2*3.14*r
print(g) 1