JavaScript Boolean toString() Method

Last Updated : 24 May, 2023

The boolean.toString() method is used to return a string either “true” or “false” depending upon the value of the specified boolean object.

Syntax:

boolean.toString()

Parameter: This method does not accept any parameter.

Return Values: It returns a string either “true” or “false” depending upon the value of the specified boolean object.

Below are examples of the Boolean toString() method.

Example 1:

javascript

// Here Boolean object obj
// is created for the value 27
let obj = new Boolean(27);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

true

Example 2:

javascript

// Here Boolean object obj is 
// created for the value true.
let obj = new Boolean(true);
 
// Here boolean.toString() function
// is used for the created object obj.
console.log(obj.toString());

Output:

true

Example 3:

javascript

// Here Boolean object obj is 
// created for the value 1.
let obj = new Boolean(1);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

true

Example 4:

javascript

// Here Boolean object obj is
// created for the value -1.
let obj = new Boolean(-1);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

true

Example 5:

javascript

// Here Boolean object obj is
// created for the value 1.2
let obj = new Boolean(1.2);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

true

Example 6:

javascript

// Here Boolean object obj is created
// for the value as string "gfg"
let obj = new Boolean("gfg");
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

true

Example 7:

javascript

// Here Boolean object obj is created
// for the value false.
let obj = new Boolean(false);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

false

Errors and Exceptions: If we try to assign a new boolean with a variable that is not defined or a complex number then an error will be thrown instead of the default true/false value.

Example 1: Here the value as geeksforgeeks gives an error because this value is not defined only true and false have been predefined.

javascript

// Here Boolean object obj is created 
// for the value geeksforgeeks.
let obj = new Boolean(geeksforgeeks);
 
// Here boolean.toString() function is
// used for the created object obj.
console.log(obj.toString());

Output:

Error: geeksforgeeks is not defined

Example 2: Here complex number can not be taken as the parameter only integer values and strings can be taken as the parameter which is why it returns an error.

javascript

// Here Boolean object obj is created for the
// value such as complex number 1+2i
let obj = new Boolean(1 + 2i);
 
// Here boolean.toString() function is 
// used for the created object obj.
console.log(obj.toString());

Output:

Error: Invalid or unexpected token

We have a complete list of Javascript Date Objects, to check those please go through this JavaScript Boolean Complete Reference article.

Supported Browsers: The browsers supported by JavaScript Boolean toString() Method are listed below:

Google Chrome
Internet Explorer
Mozilla Firefox
Opera
Safari

We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.