If there's any easy method to solve this problem pls let me know 🙂🙂🙏

Question

https://code.sololearn.com/cuOYNw64t2Eo/?ref=app

Answer 1

shivam Jaiswal , i habe my doubts about the last sample you mentioned:

# N = 110
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + (1 + 0) + (1 + 1) + (1 + 2)+(1+3)+(1+4)+(1+5)+(1+6)+(1+7)+(1+8)+(1+9)+(1+10) = 110

to get the sum of digits from the number 20, you are using (1+10) which is 11, but the sum of the digit from 20 should be 2 (2 + 0)

this is how this challenge is described on codewars website:

* Find the sum of the digits of all the numbers from 1 to N (both ends included).

So the solution is much more simple than the algorithm you used. in python it's just 6 lines of code with 2 nested for loops, or just one line with a list comprehension.
java needs a bit more lines to realize that ;-)

Answer 2

I don't got it.
How can
N(12) - > 51
and
N(100) - > 46
be?
Do you want to sum all digits for all numbers between
1 and 12,
1 and 100?