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.

Assigning the Value of One Variable to Another:

After a value is assigned to a variable using the assignment operator, you can assign the value of that variable to another variable using the assignment operator.

var myVar;
myVar = 5;
var myNum;
myNum = myVar;

The above declares a myVar variable with no value, then assigns it the value 5. Next, a variable named myNum is declared with no value. Then, the contents of myVar (which is 5) is assigned to the variable myNum. Now, myNum also has the value of 5.

Initializing Variables with the Assignment Operator:

It is common to initialize a variable to an initial value in the same line as it is declared.

var myVar = 0;

Creates a new variable called myVar and assigns it an initial value of 0.