Can someone help me understand while loops?

Question

I can't understand how both for and while loops work.
I was having a problem with this piece of code
items = int(input())
days = int(input())
#your code goes here
while days>0:
items *= 2
days-=1
print(items)

Answer 1

Basically, the way both loops work is based on repeating something until either the "while" or "for" condition is met.
While:
It will repeat the code while the condition "amount of days are greater than 0"
You have a -1 days there, so each time the amount of days will eventually get to 0 and stop the loop.

For:
Normally, you set the repeats for an amount of times.
For example, the amount of days = 4, then the loop would print until the amount of days = 0.

Answer 2

I recommend you to put a print statement into the while loop and output items and days on each iteration to see what is going on.

Answer 3

G'day lol if Lisa and Ausgrindtube have answered your question, you can edit your post to start with [Solved].

You could also adjust the tags to be something better than the silly "help", eg "python" "while" "loop"

I see the Python while loop as being kind of like:

test the condition, if false then skip, if true then run the following:
code (indented for python)
more indented code
code not indented, this is where false would skip to, it is after the loops are finished.

Your example:
test if days is greater than zero
indented code to do the algorithm
indented code to reduce the counter
loops now finished, print the result.

Answer 4

This is the answer that sololearn shows you, I want to know how while and for loops work