from math import pi def myfun(): r = float(input("Input the radius of the circle : ")) # Calculate the area of the circle using the formula: area = π * r^2 area = pi * r ** 2 print("The area of the circle with radius " + str(r) + " is: " + str(area)) if __name__=="__main__": myfun()

2 . Write a Python program that calculates the area of a circle based on the radius entered by the user.

3 . Write a Python program to display the current date and time.

4 . Write a Python program that accepts a sequence of comma-separated numbers from the user and generates a list and a tuple of those numbers.

5 . Write a Python program that accepts a filename from the user and prints the extension of the file.

6 . Write a Python program to display the first and last colors from the following list.

7 . Write a Python program that accepts an integer (n) and computes the value of n+nn+nnn.

8 . Write a Python program that prints the calendar for a given month and year.

9 . Write a Python program to calculate the number of days between two dates.

10 . Write a Python program to get the volume of a sphere with radius six.

11 . Write a Python program to calculate the sum of three given numbers. If the values are equal, return three times their sum.

12 . Write a Python program to count the number 4 in a given list.

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