Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Selected Reading
How to convert a Boolean to Integer in JavaScript?
In JavaScript, you can convert a Boolean to an integer using several methods. The most common approaches are the ternary operator, the Number() constructor, and the unary plus operator.
Method 1: Using the Ternary Operator
The ternary operator provides explicit control over the conversion values:
<html>
<head>
<title>Boolean to Integer Conversion</title>
</head>
<body>
<script>
var answer = true;
console.log("Boolean value:", answer);
var pass_marks = answer ? 90 : 40;
console.log("Passing Marks:", pass_marks);
// Converting false
var failed = false;
var fail_marks = failed ? 90 : 40;
console.log("Failed Marks:", fail_marks);
</script>
</body>
</html>
Boolean value: true Passing Marks: 90 Failed Marks: 40
Method 2: Using Number() Constructor
The Number() function converts Boolean values directly to 0 or 1:
<html>
<head>
<title>Number() Conversion</title>
</head>
<body>
<script>
console.log("true to integer:", Number(true));
console.log("false to integer:", Number(false));
var isActive = true;
var status = Number(isActive);
console.log("Status code:", status);
</script>
</body>
</html>
true to integer: 1 false to integer: 0 Status code: 1
Method 3: Using Unary Plus Operator
The unary plus (+) operator is a shorthand for Number() conversion:
<html>
<head>
<title>Unary Plus Conversion</title>
</head>
<body>
<script>
var isLoggedIn = true;
var notLoggedIn = false;
console.log("Logged in status:", +isLoggedIn);
console.log("Not logged in status:", +notLoggedIn);
// Using in expressions
var totalUsers = +isLoggedIn + +notLoggedIn;
console.log("Total boolean count:", totalUsers);
</script>
</body>
</html>
Logged in status: 1 Not logged in status: 0 Total boolean count: 1
Comparison
| Method | true ? Result | false ? Result | Use Case |
|---|---|---|---|
| Ternary Operator | Custom value | Custom value | When you need specific integer values |
| Number() | 1 | 0 | Standard binary conversion |
| Unary Plus (+) | 1 | 0 | Quick binary conversion |
Conclusion
Use the ternary operator for custom integer values, Number() or unary plus (+) for standard 1/0 conversion. The unary plus operator is the most concise for simple Boolean-to-binary conversion.
Updated on: 2026-03-15T23:18:59+05:30
471 Views
Advertisements