JavaScript

# How to convert Booleans to Numbers in JavaScript

Like other programming languages, JavaScript does support the Boolean datatype. The Boolean data type contains one of the values True/ON and False/OFF. Various methods exist for converting a Boolean to a number using JavaScript. When converting a Boolean into a number, you would either get 0 or 1 instead of False/OFF or True/ON respectively. This article provides a demonstration of converting a Boolean into a number in JavaScript:

Before getting into the details, here we are using VS Code to write JavaScript code.

## How to convert a Boolean into a number in JavaScript

This section provides the usage of various functions and operators that will be used to convert a Boolean into a number in JavaScript.

## How to use Unary operator to convert a Boolean to a number in JavaScript

The unary operator is just prefixing a “+” sign to a Boolean value and the Boolean value will be converted to the respective number. The Unary operation is carried out using the following syntax:

Syntax

+<boolean-value>;

For instance, the following code converts false and true Boolean values to relevant numbers:

Code

var n = +true; //storing the +true in n variable

console.log(n); // printing the n variable

var m = +false; // storing the +false in m variable

console.log(m); // printing the m variable

Output

## How to use Ternary operator to convert a Boolean to a number in JavaScript

The ternary operator (?) is used by following the syntax provided below:

Syntax

<boolean-value> ? 1:0;

The following line of code uses the ternary operator to convert false and true to 0 and 1 respectively:

Code

var q=true ? 1:0; //declaring q variable

console.log(q); //printing the q variable

var w = false ? 1:0; //declaring w variable

console.log(w); //printing the w variable

Output

## How to use Number() function to convert a Boolean to a number in JavaScript

The Number() function can be used to convert a Boolean value to a number, and it works on the basis of following syntax:

Syntax

Number(boolean-value);

The code provided below shows that Boolean value is passed to convert it to a number:

Code

var e=Number(true); //declaring e variable

console.log(e); //printing the e variable

var r =Number(false); //declaring r variable

console.log(r); //printing the r variable

Output

## How to use Arithmetic Operators to convert Boolean to a number in JavaScript

Interestingly, the arithmetic operators can also be used to convert a Boolean to a number in JavaScript.

## Using * to convert a Boolean to a number

The syntax provided below converts the Boolean to number:

<boolean-value>*1

The following lines of code converts the Boolean value “False” to respective number (0) and “True” to “1”:

Code

var a =false*1; //declaring a variable

console.log(a); //printing the a variable

var s =true*1; //declaring s variable

console.log(s); //printing the s variable

Output

## Using + to convert a Boolean into a number

To convert a Boolean into a number using + operator, you have to use “0” with that Boolean value: We have practiced “+” to convert Boolean to a number as shown below:

var d =false+0; //declaring d variable

console.log(d); //printing the d variable

var f =true+0; //declaring f variable

console.log(f); //printing the f variable

Output

## Conclusion

JavaScript provides support of various functions and operators to convert a Boolean into a number. This article contains the functionality of the Number() function, and operators such as AND, OR, Unary, Ternary and Arithmetic. All these operators and functions are used to convert a Boolean into a number. A Boolean number has value True/ON and False/OFF; therefore, when a Boolean is converted into a number it would return 1 or 0 for True/ON or False/OFF respectively.