there are additional tests when you click attempt, usually harder and random tests, too

Hmm I am not sure i follow you.

My code pass the basic test, but not the attempt. I am a beginnner, so not sure why there is a diffenrence.

Also how am I supposed to print the input ?

Are you implying that the parameter i pass to the function is not the correct type ?

That's because your code is wrong, print the input and figure out why. Not a kata issue.

There is something worng with the Kotlin test.

My solution workd fine in repl, but test shows errors here

add ; at the end of each lines.

when you get setbacks in life never let it go to waste just understand that you are not prepared yet and it's necessary maybe cry and then over just get back up and do it again....