My code isn't running

Tell us what’s happening:
Describe your issue in detail here.
I don’t understand why my code isn’t running what am I missing I tried to write a comment but it’s just not running

Your code so far

var a;
var b;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36

Challenge: Assigning the Value of One Variable to Another

Link to the challenge:

Hi Marwa,
You have correctly solved the problem but you have disregarded the instruction to:
// Only change code below this line
reset your code and place your solution b=a; on a new line below the comment and you should pass.

thank you very much,i run the test and it worked well