Modern JavaScript from the Beginning - Second Edition - Creating a Function

This video tutorial introduces JavaScript functions, explaining their purpose and how to create them using the function keyword. It covers the difference between parameters and arguments, and how to pass data into functions. The tutorial also explains the concept of returning values from functions, providing practical examples and use cases. The video aims to help beginners understand functions and their role in making code more readable and efficient.

What is the primary purpose of a function in JavaScript?

• To group code for later use

• To store data permanently

• To execute code immediately

• To make code run faster

What keyword is used to define a function in JavaScript?

• create

• function

• new

• define

What is the difference between parameters and arguments in a function?

• Parameters are used in loops, arguments are not

• Parameters and arguments are the same

• Parameters are the values passed, arguments are the placeholders

• Parameters are placeholders, arguments are the values passed

How do you invoke a function in JavaScript?

• By declaring it again

• By writing the function name followed by parentheses

• By using the 'run' keyword

• By using the 'invoke' keyword

What happens when a function returns a value?

• The function continues executing and the value is discarded

• The function stops executing and the value is ignored

• The function continues executing and the value is logged

• The function stops executing and the value can be used

Why might a function return no value?

• To prevent the function from being called again

• To update a database without needing a return value

• To indicate an error

• To make the function run faster

What is the significance of scope in functions?

• It defines where variables can be accessed

• It affects the function's name

• It determines the speed of the function

• It changes the function's return value