didnt work

Question

I checked both letters and underscores, but it said it was wrong. I then tried all combinations then went back to underscore and letters didnt work then either. The third time i tested it it worked

Answer 1

/*
what did you do? where's the code post it for diagnosis.
below code has some variable names they work correctly.
copy paste this in JS for test.
check below links for info on valid variable names

https://mathiasbynens.be/notes/javascript-identifiers
Valid JavaScript variable names in ECMAScript 5 · Mathias Bynens
https://mothereff.in/js-variables
JavaScript variable name validator
https://stackoverflow.com/questions/1661197/what-characters-are-valid-for-javascript-variable-names
What characters are valid for JavaScript variable names? - Stack ...

*/

'use strict';
const co = console.log;
var v = "why, what didn't work?";
var _a = alert ;
var _a23 = 'bad name write something better';
var promptshh = prompt;

co("variableshh...");
_a(v);
co(_a23)