Area of a circle can be found by multiplying a constant (pi) by square of the radius. You can refer Algorithm and flowchart of this program as well for better understanding.
Step1: Declare a constant PI=3.14
Step2: Take a numeric value (radius) from the user
Step3: Multiply square of the radius by constant (PI) and store result into a new variable
Step4: Display the resultEnd:
This program is tested and executed using Atom IDE with Python 3.8 version. To find area, we cast user input to float because input function returns string type value.