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Python Program to Find Area of a Circle.

Last Updated : 12 Mar 2026 Jul 24

Solution: 

# Prompt the user to enter the radius of a circle and convert the input to an integer
r = int(input("Enter radius of a circle: "))

# Calculate the area of the circle using the formula: area = π * r^2
area = 3.14 * r * r

# Print the calculated area of the circle
print("Area of circle is =", area)

OUTPUT:
Enter radius of a circle 7
Area of circle is =  153.86

Explaination:

This code calculates the area of a circle given its radius:

  1. Input: Prompts the user to enter the radius and stores it as an integer.
  2. Area Calculation: Uses the formula Area=π×r2 (with π approximated as 3.14).
  3. Output: Prints the calculated area of the circle.

 

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