Beginner · While loops · 87 of 264
Saving up
You save the same amount every month. How many months until you have at least the goal?
Input: the goal and the monthly saving, whole numbers, one per line. Output: the number of months.
Examples
Input
100 30
Output
4
Input
50 50
Output
1
Input
1000 7
Output
143
One more test checks other inputs when you press Check.
Stuck? The idea behind while loops
A while loop repeats as long as its condition is true: use it when you don't know in advance how many times.
Something inside the loop must change, so the condition becomes false in the end.
n = int(input())
digits = 0
while n > 0:
n //= 10
digits += 1
print(digits)Watch for: If nothing in the loop changes the condition, it never ends and the program is stopped after a few seconds.