Sum It!

Challenge
Use the programming interface to complete this task. You’ll be given a list of numbers.

Input: A list of numbers, separated by commas.
Output: The sum of the numbers.

Read the input from a file called addition.in that’s in the current working directory, and then write your output to a file called addition.out.

Solution

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mytotal= open("addition.in").readline().rstrip('\n').replace(',','+')
grandtotal = eval(mytotal)

open("addition.out",'w').write(str(grandtotal)+'\n')

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