范圍內的 Python 數字不起作用

Question

def def range_test(num):
  if 1 < num < 550  :
    return( "{:d} is in range.".format(num))
  else:
    return("The number you entered is outside the range!")
num = int(input("Enter a number: "))

我的程序只是打印“輸入一個數字：”作為它的輸出？ 你能弄清楚為什么嗎？ 謝謝！

Answer 1

您還沒有調用該函數。 輸入后，需要： range_test(num)來調用函數。 如果要打印輸出，還需要打印返回值。

完整的程序應該是：

def range_test(num):
  if 1 < num < 550  :
    return( "{:d} is in range.".format(num))
  else:
    return("The number you entered is outside the range!")
num = int(input("Enter a number: "))
print(range_test(num))

Answer 2

# manipulated code given below. it is working perfectly
def range_test(num):
   if 1 < num < 550  :
       return( "{:d} is in range.".format(num))
   else:
       return("The number you entered is outside the range!")

num = int(input("Enter a number: "))
s1=range_test(num)
print"%s"%(s1)