I'm able not do

Tell us what’s happening:

Your code so far

var a;
a = 5;
var abc;
abc = a;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36.

Challenge: Assigning the Value of One Variable to Another

Link to the challenge:

You would probably have to reset your code.
Only change the code below the comment as instructed.
You dont need to redeclare any other variable, just assign a to b

What exactly is your doubt here?
In this piece of code, var abc gets the value of a. since we have var keyword, hoisting takes place here.