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Python: Input the radius of a circle and compute the area

Python Basic: Exercise-4 with Solution

Write a Python program which accepts the radius of a circle from the user and compute the area.

Python: Area of a Circle

In geometry, the area enclosed by a circle of radius r is πr2. Here the Greek letter π represents a constant, approximately equal to 3.14159, which is equal to the ratio of the circumference of any circle to its diameter.

Python: Area of a circle

Sample Solution:-

Python Code:

from math import pi
r = float(input ("Input the radius of the circle : "))
print ("The area of the circle with radius " + str(r) + " is: " + str(pi * r**2))

Sample Output:

Input the radius of the circle : 1.1                                                                          
The area of the circle with radius 1.1 is: 3.8013271108436504 

Flowchart:

Flowchart: Input the radius of a circle  and compute the area.

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Python: Tips of the Day

Try-catch-else construct:

try:
  foo() 
except Exception: 
  print("Exception occured")
else:
  print("Exception didnt occur")
finally:
  print("Always gets here")