Variable Scope Woos

Variables, you see, are like tiny, mischievous gremlins in your code.

They scurry about, causing chaos and confusion, until you catch them and pin them down with a firm declaration of var foo = 5;.

But, oh no! Sometimes, they escape and wreak havoc on your program, leaving a trail of bugs and tears in their wake.

Learn how to catch the slippery little devils Understand how to use closures to contain the madness Discover the joys of block scope, where variables don't run amok