@jessetrading1993

It is unusual to have such kind of questions here but I will give you an answer, write this in your new file and execute it with python3 while.py

sum = 0
i = 0
while True:
        n = int(input("Input a number "))
        if n == -1:
                break
        sum += n
        i += 1

print("Average is {}".format(sum/i))

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Hope this helps

https://assets.digitalocean.com/books/python/how-to-code-in-python.pdf