What is a function in JavaScript?

Q: What is a function in JavaScript?

They are considered **First-Class Citizens,** meaning they can be treated like any other variable. Functions allow you to **encapsulate code,** provide input through parameters, and return output using the `return` keyword. In JavaScript, **functions are objects,** and they have both properties and methods.

Difficulty: 3/10

closures & scope, first-class functions, execution context

A function in JavaScript is a reusable block of code designed to perform a particular task.

1
They are considered First-Class Citizens, meaning they can be treated like any other variable.
2
Functions allow you to encapsulate code, provide input through parameters, and return output using the return keyword.
3
In JavaScript, functions are objects, and they have both properties and methods.

Scenario Questions

0-2 years experience

Follow-up Questions