JavaScript Functions

The video tutorial introduces JavaScript functions, explaining their reusability and syntax. It covers traditional and modern function syntax, including the use of 'let' and arrow functions. The tutorial demonstrates how to create functions with parameters and return values, emphasizing the importance of using return statements for more versatile functions. The video concludes with a detailed explanation of arrow functions, highlighting their concise syntax.

What is the primary purpose of a function in JavaScript?

• To store data

• To perform a specific task

• To style HTML elements

• To manage user inputs

Which keyword is used to define a traditional function in JavaScript?

• define

• method

• function

• create

What is required to execute a function in JavaScript?

• Function declaration

• Function variable

• Function call

• Function signature

What does the 'cubeThis' function do?

• Squares a number

• Subtracts two numbers

• Cubes a number

• Adds two numbers

How does JavaScript handle floating point numbers in functions?

• Converts them to integers

• Returns them as strings

• Processes them as floating points

• Ignores them

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

• To return a value to the caller

• To output a value to the console

• To declare a variable

• To stop the function

What is the benefit of using a function that returns a value?

• It uses less memory

• It can be reused in different contexts

• It is easier to write

• It runs faster

What is a key feature of arrow functions in JavaScript?

• They cannot return values

• They have a shorter syntax

• They do not require parameters

• They are longer than traditional functions

How do arrow functions differ from traditional functions in terms of syntax?

• They use the 'function' keyword

• They use an arrow (=>) to separate parameters and body

• They require a 'return' statement

• They do not use parentheses

What is the output of the arrow function 'greeting'?

• Hello World

• Goodbye World

• JavaScript Functions

• Arrow Functions