Challenge 8

This challenge is intended to be taken after the modules section.

Problem 1: Custom Module

1. Create a new file called greetings.py.
2. In greetings.py, define a function called say_hello(name) that returns a string "Hello, {name}!".
3. In the editor below, import the greetings module and use the say_hello function to greet a user.

# Assume greetings.py exists
# Your code here

Problem 2: Using the math module

• Ask the user to enter the radius of a circle.
• Use the math module to get the value of PI and to calculate the area of the circle (Area = π * r^2).
• Print the calculated area.

Problem 3: Number Guessing Game

• Use the random module to generate a random integer between 1 and 100.
• Create a loop that asks the user to guess the number.
• After each guess, tell the user if their guess was too high or too low.
• The loop should end when the user guesses the correct number.

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