input: Write a function to calculate the average of five numbers entered by a user. The function should prompt the user to enter five numbers, calculate their average, and print the result.
  assert calculate_average()=="The average is 3.0"
  assert calculate_average()=="The average is 5.0"
  assert calculate_average()=="The average is 7.0"
  assert calculate_average()=="The average is 6.0"
  assert calculate_average()=="The average is 2.0"
output: def calculate_average():
      total = 0
      for _ in range(5):
          total += float(input("Enter a number: "))
      average = total / 5
      return f"The average is {average}"