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def calculate_average(n):
return sum(n) / len(n)
def main():
numbers: list[int] = []
while True:
num = int(input("Enter number: "))
if num < 0:
break
numbers.append(num)
average = calculate_average(numbers)
print(f'You entered: {len(numbers)} numbers')
print('The average of these numbers is =', round(average, 2))
if __name__ == '__main__':
main()
Enter number: 5
Enter number: 2
Enter number: 1
Enter number: 3
Enter number: -1
You entered: 4 numbers
The average of these numbers is = 2.75