一步一步解释这段代码 [英] Step by Step explanation of this code

问题描述

  def mystery（n）：
 a，b = 0,1 
 while a< n：
 print（a）
a，b = b，a + b 
  

如果有人可以给我一行一行的解释这段代码，也告诉我为什么它不会运行，以及需要添加哪些额外的代码。

解决方案 def mystery（n）：＃定义一个名为mystery的函数，接受一个名为n的参数
a，b = 0,1＃将一个名为a的变量设置为0;制作一个名为b的变量并将其设置为1
，而< n：＃只要a小于n
print（a）＃在屏幕上显示a中包含的值
a，b = b，a + b＃set b与a和b的总和;将a设置为b的旧值（在它被设置为a和b之前）


def mystery(n):
   a, b = 0, 1
   while a < n:
      print (a)
      a, b = b, a + b

If someone could give me a line by line explanation of this code, as also inform of why it will not run, and what extra code needs to be added.

解决方案

def mystery(n):  # define a function named "mystery", that takes one argument called "n"
    a, b = 0, 1  # make a variable named "a" and set it to 0; make a variable named "b" and set it to 1
    while a < n:  # as long as "a" is smaller than "n"
       print (a)  # display the value contained in "a" on the screen
       a, b = b, a + b  # set "b" to the sum of "a" and "b"; set "a" to the old value of "b" (before it was set to the sum of "a" and "b")

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