In this program, you will learn how to find the area of a circle using the function in Python.

`area = 3.14 * r * r`

## Example: How to find the area of a circle using the function in Python.

```
def findarea(r):
area = 3.14 * r * r
return area
r = int(input("Enter radius of a circle:"))
area = findarea(r)
print("Area of a circle is: ", area)
```

#### Output:

```
Enter radius of a circle:3
Area of a circle is: 28.259999999999998
```