Irregularly posted coding challenge #5!

Question

This will be similar to number 3.

Kaprekar numbers. Read my answer for info.
Either:
a) Have the user enter a number and check if it's a Kaprekar number or not
b) Have the user enter a number n and print the first n Kaprekar numbers
c) Have the users enter two numbers n and m and print all Kaprekar numbers between them

Answer 1

A Kaprekar number is a positive integer where the square of it can be split into two halves, and adding those together, turns back into the initial number. Example:
45 is a Kaprekar number, because:
45² = 2025
You can split 2025 into 20 and 25
20 + 25 = 45

Answer 2

@Burey nice code, I like how you designed the page (with info, examples etc)

@Edward I like that you took a different challenge instead of the typical "is x a Kaprekar?"!

Answer 3

@Burey I guess the square of 1 (1) can separate into one part (1) which, totalled, equals one.

Answer 4

@Edward if you havent already, look at my other challenges

Answer 5

yes that

Answer 6

@Edward yes, for example if it has an odd number of digits

Answer 7

So 1 is not a Kaprekar number?

Answer 8

ty for the heads up @Edward
fixed it now by validating that the right side of the pair is not made entirely of '0'

Answer 9

I would say of course! It is supposed to be whoever posts first... I say go for it @Burey

Answer 10

https://code.sololearn.com/W93QTFLln3s1/?ref=app

ok then xD

Answer 11

Supersebi3
i got a code ready
can i post?

Answer 12

i have problems with the number 1 as well
it's due to the fact its squarr is also one and cannot be divided into two parts
so have to make a private case of it

Answer 13

@J.G.
according to every google result i have seen 1 is indeed a Kaprekar number
couldn't find a specific explanation

Answer 14

https://code.sololearn.com/cFZqYsO0r7wf/?ref=app

final answer

Answer 15

https://en.m.wikipedia.org/wiki/Kaprekar_number

Answer 16

oh you beat me to it xD

Answer 17

@burey i just noticed, your code says 100 is a kaprekar. but according to wikipedia its not; 100^2 = 10000 and 100 + 00 does in fact equal 100, but wikipedia says you cant add 0 in the second half of the square

Answer 18

this challenge was a lot easier than i thought at first. need more pls :)

Answer 19

wait i think i did it. and 1 is a kaprekar according to the wikipedia page

Answer 20

Enter 2 numbers, it will return the Kaprekar Numbers between them. It isn't as good as Edwards, but it does work

https://code.sololearn.com/cceiiT6pO3M5/?ref=app