now working :) after the reset! thx :)

Either copy your code and hit Reset button at the bottom, or simply click Attempt. I don't see how it wouldn't work, I ran it myself and it passed.

No, i never touch the original test :/

But your current code passes all tests. Did you modify sample tests for this error to happen?

yes also saw and i changed again. so now the name of the function is evenOrOdd.

and the error:

ReferenceError: even_or_odd is not defined
at /home/codewarrior/index.js:12:10
at /home/codewarrior/index.js:16:5
at Object.handleError

so i think this task is not difficult but i got some error :)

Your solution is printing the results instead of returning them. In a Codewars kata, functions should use return statements to output results, not print statements. Here, the function even_or_odd should return "Even" or "Odd", rather than printing these values to the console.

I have the solution, but the test, say it's wrong :/, who can help me ?

The error message indicates that the function name used in the test cases is evenOrOdd, but your function is named even_or_odd. JavaScript is case-sensitive, so the function name must match exactly what is expected by the test cases.