Answered: Write a function called 'average' that…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a function called 'average' that receives a list of numbers like parameter and return the average of those numbers. The list that receives the function must be entered by the user, but it must be validated that only numbers are entered. Whether enter a different value, the function should print 'ERROR' on the screen.

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Define a function called 'average' that takes a list of numbers as a parameter.
- Inside the 'average' function: a. Initialize a try-except block to handle potential ValueErrors. b. Attempt to convert each element in the input list to a float. c. Calculate the average by summing the numbers and dividing by the count. d. If successful, return the calculated average. e. If a ValueError occurs (e.g., non-numeric input), return 'ERROR'.
Define another function called 'get_numeric_input' that doesn't take any parameters.
- Inside the 'get_numeric_input' function: a. Initialize an empty list called 'num_list' to store the numeric input. b. Start an input loop: i. Prompt the user to enter a number (or 'done' to finish). ii. Read the user's input. iii. If the user input is 'done,' exit the loop. iv. Try to convert the user input to a float. v. If successful, add the number to 'num_list.' vi. If a ValueError occurs, print 'ERROR: Please enter a valid number.' c. Return 'num_list' containing the numeric input.
Get user input by calling the 'get_numeric_input' function.
- This function prompts the user to enter numbers and validates their input.
Calculate the average by calling the 'average' function with the list of numbers obtained from step 3.
- Check if the result is 'ERROR.'
If the result is 'ERROR,' print 'ERROR: Invalid input detected.'
- This occurs if non-numeric input was detected during data entry.
If the result is a valid average, print the calculated average on the screen.
End.

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