JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - What Are Functions in JavaScript - Part I

This video tutorial covers the basics of writing and using functions in JavaScript. It begins with an introduction to functions, explaining their importance in reusing code and improving efficiency. The tutorial then provides a step-by-step guide on how to write a function, including syntax and structure. Finally, it demonstrates how to execute a function, highlighting the power of choosing when to use it.

Why are functions considered efficient in programming?

• They are not necessary in modern programming.

• They are only used in JavaScript.

• They make the code longer and more complex.

• They allow for code reuse and save resources.

What is the first step in writing a function in JavaScript?

• Calling the function.

• Adding arguments.

• Using the keyword 'function'.

• Naming the function.

What do curly brackets define in a JavaScript function?

• The arguments of the function.

• The instructions or body of the function.

• The return type of the function.

• The name of the function.

How do you execute a function in JavaScript?

• By saving the file.

• By using the keyword 'execute'.

• By declaring it with 'let'.

• By writing the function name followed by brackets.

What happens when you call a function in JavaScript?

• The function is deleted.

• JavaScript reads and executes the function's instructions.

• The function is saved to a file.

• The function is renamed.