JavaScript Algorithms and Data Structures
Basic JavaScript
Storing Values with the Assignment Operator
In JavaScript, you can store a value in a variable with the assignment operator (=).

myVariable = 5;
This assigns the Number value 5 to myVariable.

If there are any calculations to the right of the = operator, those are performed before the value is assigned to the variable on the left of the operator.

var myVar;
myVar = 5;
First, this code creates a variable named myVar. Then, the code assigns 5 to myVar. Now, if myVar appears again in the code, the program will treat it as if it is 5.
for more:http://besturl.link/gIxIC3y