Basic JavaScript - Assigning the Value of One Variable to Another

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.

Your code so far
help me understand this

var a;
a=7;
var b;
ab = a;


// Only change code below this line

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Challenge: Basic JavaScript - Assigning the Value of One Variable to Another

Link to the challenge:

2

the variable whos name is a points to the number 7.
you are asked to assign a variable called b to the contents of a, in other words, what it points to.
therefore, below the line where is says
// Only change code below this line
you can write
b = a

this means that b points to a,
and a points to 7
so, eventually, b will return 7