Yes, it's not supposed to work, Idk how they validated it!

You have to add brackets as follows :

$"Congratulations! You're going to have a {(sperm == "XY" ? "son" : "daughter")}.";

See Microsoft's documentation about string interpolation using $

Thank you for your reply, i will try better next time.

It may not be exactly the same, but there are many katas doing this kind of stuff with some variation. I advice you to read carefully the content authoring guidelines before publishing new katas: https://docs.codewars.com/authoring/guidelines/

There are more than 7000 katas currently available on CodeWars. It's really getting hard to find out novel ideas, particularly with tasks implying only basic things like parsing, comparing, sorting, reducing...

These are two other similar katas:

• https://www.codewars.com/kata/597d75744f4190857a00008d
• https://www.codewars.com/kata/5af974846bf32304a2000e98

i dont think that this kata is the same with https://www.codewars.com/kata/60dbc94243ca68000d2d191c/java

Counting digits in a number has been done before.
https://www.codewars.com/kata/60dbc94243ca68000d2d191c/java

This is issue is resolved

Random tests always expect false.

plagiarism: https://stackoverflow.com/a/24031467