Convert boolean result into number/integer in JavaScript

A JavaScript boolean represents one of two values: true or false.
However, if one wants to convert a variable that stores boolean value, into integer “0” or “1”, they can do so using multiple approaches. We will look into some of them in this article.

The most popular methods are:

Using ternary or conditional operator
Using unary + operator.
Using bitwise And (&) or bitwise Or ( | ) operator.
Using Number() function. It converts data type to number.

Using ternary or conditional operator:

Syntax:
```
var i = value ? 1 : 0;
```

Program:

<!DOCTYPE html> 
<html> 

<body> 

    <center> 

        <h1 style="color:green">GeeksforGeeks</h1> 

        <h4>Click the button to change the boolean  

                                     value into number.</h4> 

        <script> 

            // Initializing boolvalue as true 

            var boolvalue = true

        </script> 

        <button onclick="myFunction()">Change</button> 

        <p>The number value of the variable is :</p> 

        <p id="result"></p> 

        <script> 

            // JavaScript program to illustrate boolean  

            // conversion using ternary operator 

            function myFunction() { 

                var i = boolvalue ? 1 : 0; 

                document.getElementById("result").innerHTML = i; 

            } 

        </script> 

  </center> 
</body> 

</html>

Output after clicking the button:

Using unary + operator:

Syntax:
```
var i = + boolvalue;
```

Program:

<!DOCTYPE html> 
<html> 
<body> 

    <center> 

        <h1 style="color:green">GeeksforGeeks</h1>  

        <p>Click the button to change the boolean value.</p> 

        <script> 

            // Initializing boolvalue as true 

            var boolvalue = true; 

        </script> 

        <button onclick="myFunction()">Change</button> 

        <p>The value of the variable is now:</p> 

        <p id="result"></p> 

        <script> 

            // JavaScript program to illustrate boolean  

            // conversion using unary operator 

            function myFunction(){ 

                var i = + boolvalue; 

                document.getElementById("result").innerHTML = i; 

            } 

        </script> 
</body> 
</html>

Output after clicking the button:

Using bitwise And (&) or bitwise Or ( | )

Syntax:

var i = boolvalue & 1; // bitwise and
var j = boolvalue | 0; // bitwise or

Program:

<!DOCTYPE html> 
<html> 
<body> 

    <center> 

        <h1 style="color:green">GeeksforGeeks</h1>  

        <p>Click the button to change the boolean value.</p> 

        <script> 

            // Initializing boolvalue as true 

            var boolvalue = true; 

            // Initializing boolvalue2 as false 

            var boolvalue2 = false; 

        </script> 

        <button onclick="myFunction()">Change</button> 

        <p>The value of the variable 1 is now:</p> 

        <p id="result"></p> 

        <p>The value of the variable 2 is now:</p> 

        <p id="result2"></p> 

        <script> 

            // JavaScript program to illustrate boolean  

            // conversion using bitwise operator 

            function myFunction(){ 

                var i = boolvalue & 1; 

                var j = boolvalue2 | 0; 

                document.getElementById("result").innerHTML = i; 

                document.getElementById("result2").innerHTML = j; 

            } 

        </script> 
</body> 
</html>

Output after clicking the button:

Using Number() function. It converts data type to number.:

Syntax:
```
var i = Number(boolvalue);
```

Program:

<!DOCTYPE html> 
<html> 
<body> 

    <center> 

        <h1 style="color:green">GeeksforGeeks</h1>  

        <p>Click the button to change the boolean value.</p> 

        <script> 

            // Initializing boolvalue as true 

            var boolvalue = true; 

        </script> 

        <button onclick="myFunction()">Change</button> 

        <p>The value of the variable is now:</p> 

        <p id="result"></p> 

        <script> 

            // JavaScript program to illustrate boolean  

            // conversion using Number() function 

            function myFunction(){ 

                var i = Number(boolvalue); 

                document.getElementById("result").innerHTML = i; 

            } 

        </script> 
</body> 
</html>

Output after clicking the button:

Article Tags :

JavaScript

Web Technologies

JavaScript-Questions