Java Script variable

     💥Creating a variable in JavaScript is called "declaring" a variable.

• You declare a JavaScript variable with the var keyword

• Start the statement with var and separate the variables by comma
•   you can do arithmetic with JavaScript variables

      👊 <script>
var x = 2 + 3 + "5"
document.getElementById("demo").innerHTML = x;
</script>

output: 55 

    👊<script>
var x = 5 + 2 + 3;
document.getElementById("demo").innerHTML = x;
</script>

output: 10

    👊<script>
x = "5" + 2 + 3;
document.getElementById("demo").innerHTML = x;
</script>

output: 523

   👊 <script>
var x = 5;
var y = 2;
var z = x * y;
document.getElementById("demo").innerHTML = z;
</script>

outtput 10