Vasi

print("Input some integers to calculate their sum and average. \nInput 0 to exit")
n = int(input())
sum = 0
count = 0
while (n != 0):
    sum += n
    n = int(input())
    count += 1
average = sum / count
print("Average: %.2f" % average)
print("Sum: %.2f" % sum)