3. Sum of Numbers Assume that a file containing a series of integers is named numbers . dat and exists on the computer's disk. Design a program that reads all of the numbers stored in the file and calculates their total.

The program written in Python is as follows:

file_handler = open("numbers.dat","r")

nums = 0

for line in file_handler:

     try:

           nums+=int(line)

     except ValueError:

           continue

file_handler.close()

print("Sum: "+str(nums))

Explanation:

The file handler is used to enable the program reads content of the file numbers.dat

file_handler = open("numbers.dat","r")

This initializes the sum of numbers to 0

nums = 0

This iterates through the line of the file

for line in file_handler:

The try exception is used to prevent program crash if data other than integer is read

     try:

This adds numbers on each line

           nums+=int(line)

This exception is returned for data other than integers

     except ValueError:

           continue

This closes the file handler

file_handler.close()

This prints the calculated sum

print("Sum: "+str(nums))

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