Question

Assume a file containing a series of integers is named _______ and exists on the computer's disk. Write a program that calculates the average of all the numbers stored in the file.

Answer 1

To calculate the average of all numbers in a file named numbers.txt, you need to open the file, read numbers into a list, calculate the sum and the count of the numbers, compute the average, and then close the file.

Step-by-step explanation:

Let's assume a file named numbers.txt contains a series of integers and exists on the computer's disk. To write a program that calculates the average of all the numbers stored in the file, you would need to perform the following steps:

1. Open the file in read mode.
2. Read the integers from the file and store them in a list.
3. Calculate the sum of the integers using a variable, let's call it Sx.
4. Count the number of integers read from the file; this will be our n.
5. Compute the average by dividing Sx by n.
6. Close the file after completing the operations.
7. Print out the result which is the average of the numbers.

The program's code would look something like this in Python:

# Assume the file is named numbers.txt
file_name = 'numbers.txt'
with open(file_name, 'r') as file:
numbers = [int(line.strip()) for line in file.readlines()]
Sx = sum(numbers)
n = len(numbers)
average = Sx / n
print('The average of the numbers is:', average)