Quick JavaScript Crash Course - Modern and Advanced JavaScript - Default Operators

The video tutorial covers the use of REST and spread operators in JavaScript, highlighting their individual and combined functionalities. It then introduces the concept of default parameters, explaining how parameters default to undefined in JavaScript. With the advent of ES6, developers can now set default values for parameters, ensuring that functions use these defaults when no value is provided, rather than defaulting to undefined.

What is one of the uses of the spread operator in JavaScript?

• To define a class

• To create a new function

• To declare variables

• To combine multiple arrays into one

What happens to function parameters in JavaScript if no value is provided?

• They default to undefined

• They default to an empty string

• They default to null

• They default to zero

Which version of JavaScript introduced the ability to set default parameter values?

• ES6

• ES7

• ES5

• ES8

Why would you set a default value for a function parameter?

• To ensure the function always returns a string

• To prevent the function from executing

• To provide a fallback value if no argument is passed

• To make the function run faster

What is the benefit of using default parameters in JavaScript functions?

• They increase the number of arguments a function can take

• They automatically convert data types

• They allow functions to handle missing arguments gracefully

• They make the code more complex