To modify the program in Exercise 2b to prompt the user for the interest rate and pass both the amount of money and interest rate to the interest-calculating method, you can follow these steps:
Step 1: Start by defining the main program. This is where you will prompt the user for the amount of money and the interest rate.
Step 2: Inside the main program, use the input() function to prompt the user for the amount of money. Store the user's input in a variable, let's call it 'amount'.
Step 3: Next, use the input() function again to prompt the user for the interest rate. Store the user's input in a variable, let's call it 'interest_rate'.
Step 4: Convert both the 'amount' and 'interest_rate' variables to the appropriate data types. For example, you can use the float() function to convert them to floating-point numbers.
Step 5: Now, call the interest-calculating method from Exercise 2b and pass both the 'amount' and 'interest_rate' as arguments to the method. For example, if the method is named 'calculate_interest', you can call it like this: calculate_interest(amount, interest_rate).
The modified code may look something like this:
```python
def calculate_interest(amount, interest_rate):
interest = amount * (interest_rate / 100)
return interest
def main():
# Step 2
amount = float(input("Enter the amount of money: "))
# Step 3
interest_rate = float(input("Enter the interest rate: "))
# Step 5
interest = calculate_interest(amount, interest_rate)
print("The interest is:", interest)
# Call the main function to start the program
main()
```
With this modification, the program will now prompt the user for both the amount of money and the interest rate, and then pass both values to the `calculate_interest` method to calculate and display the interest.