"Assume that a file containing a series of integers is named numbers. txt and exists on the computer’s disk. Write a program that reads all of the numbers stored in the file and calculates their total."

The program to this question can be described as follows:

Program:

def sum(): #defining the method main  

   f = open('numbers.txt','r') #open the file in r mode

   total = 0#Initialize variable total to 0

   for i in f: #defining a loop to calculate total of the number  

       num = int(i) #holding value of file in num variable  

       total =total+ num # adding the value in total variable

   f.close() # close the file

   print('Total of the number is: ',total) #print total

sum() #calling the method

Explanation:

In the question it is declared that a file "numbers.txt" is declared, that contain the number so, the code to calculate the total of the number can be defined above and the description of the code as follows:

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