Python JavaScript SQL HTML R C C++ Java RUST Golang Kotlin Swift C# DSA

Popular Tutorials

Operators in JavaScript
JavaScript for Loop
Functions in JavaScript
JavaScript Objects
Arrays in JavaScript
Start Learning JavaScript

Popular Examples

JavaScript "Hello World" Program
Calculate the area of a triangle
Check if a number is odd or even
Find the GCD
Print the Fibonacci series
Explore JavaScript Examples

Reference Materials

String Methods
Array Methods
Math Object
View all
Learning Paths
Challenges

Learn Python Interactively

Try for Free

Courses

Interactive SQL Course
Interactive C Course
Interactive Java Course
View all Courses
Python
JavaScript
SQL
HTML
R
C
C++
Java
More languages

Popular Tutorials

Operators in JavaScript
JavaScript for Loop
Functions in JavaScript
JavaScript Objects
Arrays in JavaScript
Start Learning JavaScript All JavaScript Tutorials

Reference Materials

String Methods
Array Methods
Math Object
View all
Python
JavaScript
R
C
C++
Java
Kotlin

Popular Examples

JavaScript "Hello World" Program
Calculate the area of a triangle
Check if a number is odd or even
Find the GCD
Print the Fibonacci series
All JavaScript Examples

JavaScript Function Object

In JavaScript, functions have properties and methods just like other objects because they themselves are Function objects.

In this reference page, you will find all methods of a Function object and its properties. For example, the length property of a function denotes the number of arguments expected by the function.

JavaScript Function toString()

Returns source code of function as a string

Javascript Function.length

Returns the number of parameters of a function

Javascript Function.name

Returns the name of the given function

Javascript Function apply()

calls function with this value and array of args

Javascript Function call()

Calls a function with a given this value and args

JavaScript Function bind()

Creates new function with given this value & args