Programming Tip -How to use multiple for and while loops together in Python?

Today i am going to show Programming Tip -How to use multiple for and while loops together in Python
with simple code. I hope you will understand this.
If you have any query you can ask.
i hope you will like it.

You can even nest a for loop inside a while loop or the other way around. For example,

for i in range(5):
   j = i
   while j != 0:
      print(j, end=', ')
      j -= 1
   print("")


This will give the output

1,
2, 1,
3, 2, 1,
4, 3, 2, 1,
You can take this nesting to as many levels as you like.