Basics #4 Viewing Console in Developer Tools
1. Using console.log
The mostly used way to check variable values is to use console.log().
console.log("Hello World");2. Opening Developer Tools in Chrome
From the menu select More Tools>Developer Tools.
3. Opening Developer Tools in Firefox
From the menu select Tools>Web Developer>Toggle Tools.
4. Errors are also logged here.
Whenever some of your scripts do not work as expected,go to console to check error message for debugging.