Learn JavaScript from Scratch JavaScript for Everyone - JavaScript Closures

The video tutorial explains how to create and execute functions in JavaScript, focusing on variable access and closures. It highlights the importance of understanding variable scope, especially when using 'var' inside functions. The tutorial also discusses potential pitfalls when dealing with closures and encourages viewers to practice by creating variables outside and inside functions to observe their behavior.

Describe how you would create a function that uses a parameter and what happens if that parameter is not defined.

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What happens when you try to access a variable defined inside a function from outside that function?

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