Cannot read property preset is undefined what does this mean?

Tell us what’s happening:

Your code so far

// Setup
var a = 7;
var b = a;

// Only change code below this line

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; ) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36.

Challenge: Storing Values with the Assignment Operator

Link to the challenge:

// Only change code below this line

You get buggy or incorrect behavior when you change code above this comment.


so what i have to do now to correct this one

I’d reset your code and only make changes below that line.

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