Starting with creating our data file data.txt:
12
54
7
332
54
1
0
We start by defining an integer, total to be zero before the loop. Inside the loop we add the line of code total += number which increases the variable total by the value in the variable number.
Finally we print the total:
total = 0
with open("data.txt") as f:
for line in f:
number = int(line)
total += number
print("Sum of all values is:", total)
python file.py