Python 阶乘 while 循环

Question

需要有关此代码的帮助。它第一次计算阶乘罚款，但当它在 while 循环中循环时，它似乎正在存储值并递增它。有什么建议吗？

#Get number and store in variable, also declare and initialize factorial variable
number = int(input("Please enter a nonnegative integer number (or enter 0 to end program): "))
print()
factorial= 1

#Check if number is a negative integer and if it is, prompt for input again or give option to end program
if number <0:
    while number !=0 and number <0:
      print("You have entered a negative integer. Please try again.")
      number = int(input("Please enter a nonnegative integer number (or enter 0 to end program): "))
      print()

#Calculate and display factorial of number while input is valid
while number != 0 and number >=1:
  #Calculate and display factorial value
  while number >= 1:
    factorial = factorial * number
    number = number -1
  print("The factorial for that number is: {}".format(factorial))
  print()

  #Get the next number
  number = int(input("Please enter another nonnegative integer number or enter 0 to end program: "))
  print()

  #Check if newly entered number is a negative integer and if it is, prompt for input again or give option to end program 
  if number <0:
    while number !=0 and number <0:
      print("You have entered a negative integer. Please try again.")
      print()

      #Prompt again for valid nonnegative integer
      number = int(input("Please enter a nonnegative integer number (or enter 0 to end program): "))
      print()

Answer 1

您没有在 while 循环运行之间重置阶乘的值。你应该移动行

factorial= 1

待在

之后

#Calculate and display factorial of number while input is valid
while number != 0 and number >=1:

Python 阶乘 while 循环

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