python: practice recurse function

Posted 2021-03-05 alansuny

starting with a  factorial :

def      function_factorial(n):

       number=1

      for i   in   range(1,n+1):

        number *=i

       return number 

print(function_factorial( n)

use this application can acheved one number‘s factorial.

similar  recurse function also can realized one number factorial:

def  function_recurse(n):

      if  n==1:

          return 1

   return n*function_recurse(n-1)

print(function_recurse(n))

recurse function have follow  characters:

 1:in itself‘s function call itself  realize it function  performance

2:must setup a broke point ,otherwise it will enter a endless loop.

3: all recurse function can realize function loop also can do .

4:recurse productive  low efficiency,workpiece ratio inefficiency