Play with values interactively

Modern browsers have powerful tools to help JavaScript developers. One of them is the console

In Chrome, you can open the console with:

• CTRL + SHIFT + J (PC)
• CMD + ALT + J (MAC)

It is then possible to execute simple JavaScript instructions and see the result or to check the current value of a variable.

Example

Enter the following instructions in your console (one by one) and watch what is printed.

var x;

x = 5;

x + 4;

x = x * 6;

x / 3;