Learn JavaScript from Scratch JavaScript for Everyone - Functions: Reusing Code

The video tutorial introduces functions in JavaScript, emphasizing the DRY principle for code reuse. It covers creating functions, using external JavaScript files, and provides examples like a greeting function. The tutorial explains typecasting, handling data types, and understanding function types and return values. It concludes with a homework assignment to practice creating functions with parameters.

What does the acronym DRY stand for in programming, and why is it important?

Explain how functions help in avoiding code duplication.

What is the purpose of the 'return' statement in a function?

Describe the concept of scope in relation to variables declared within a function.

How can you pass parameters to a function, and what happens if you pass in a string instead of a number?

What is typecasting, and how can it be useful when working with functions?

Why is it important to understand the difference between a function and the result it returns?