How to check if a value is a safe integer in JavaScript?
In this tutorial, we will learn to check if a value is a safe integer in JavaScript. The simple definition of safe integers in JavaScript are all numbers that we can represent as IEEE-754 double precision numbers. It is the set of all numbers between -(2^53) and (2^53), and we can represent it in the standard way.
Here we have different methods to check if a number is a safe integer.
Use Number.IsSafeInteger() method
Use if-else conditional statements
Use Number.isSafeInteger() method
In JavaScript, the isSafeInteger() method checks whether the type of a value is a number and is between -(2^53) and (2^53). We can pass different values as arguments to this method and return a Boolean value as the result. Returns true if the number is a safe integer, false otherwise.
grammar
Users can use the following syntax to use the isSafeInteger() method
let isSafe = Number.isSafeInteger(value);
parameter
value - This is the value of any variable where the user wants to check if the value is a safe integer.
Example
In the example below, we use the Number.isSafeInteger() method to check if the value is a safe integer. We checked it for different values like boolean, string, float and integer
<html>
<head>
</head>
<body>
<h2 id="Check-if-value-is-safe-Integer-or-not-in-JavaScript">Check if value is safe Integer or not in JavaScript.</h2>
<h4 id="Check-if-value-is-safe-Integer-or-not-using-i-isSafeInteger-i-method">Check if value is safe Integer or not using <i> isSafeInteger() </i> method.</h4>
<div id = "output"></div>
<script>
var output = document.getElementById("output");
let value = 1000;
let isSafe = Number.isSafeInteger(value);
output.innerHTML += "1000 is safe Integer : " + isSafe + " <br/> ";
output.innerHTML += "true is safe Integer : " + Number.isSafeInteger(true) + " <br/> ";
output.innerHTML += "'Hello' is safe Integer : " + Number.isSafeInteger("hello") + " <br/> ";
output.innerHTML += "Math.pow(2,53) is safe Integer : " + Number.isSafeInteger(Math.pow(2, 53)) + " <br/> ";
output.innerHTML += "123.43 is safe Integer : " + Number.isSafeInteger(123.43) + " <br/> ";
output.innerHTML += "-90 is safe Integer : " + Number.isSafeInteger(-90) + " <br/> ";
</script>
</body>
</html>
Use if-else conditional statements
In this method we will simply use if-else statement to check if the value is of numeric type. If the value is a number, we check if it is between -(2^53) and (2^53). This is custom logic based on the isSafeInteger() method which returns a boolean output.
grammar
The syntax for using an if-else statement to check whether a value is a safe integer is as follows.
if ( typeof value === 'number' && -Math.pow(2, 53) < value && Math.pow(2, 53) > value ) {
// value is safe integer
} else {
// value is not safe integer
}Example
In the following example, we simply implement the above method. We created a function called safeInteger() that checks for a safe integer based on the above method and returns a Boolean value.
<html>
<head>
</head>
<body>
<h2 id="Check-if-value-is-safe-Integer-or-not-in-JavaScript">Check if value is safe Integer or not in JavaScript.</h2>
<h4 id="Check-if-value-is-safe-Integer-or-not-using-i-if-else-i-statement">Check if value is safe Integer or not using <i> if-else</i> statement.</h4>
<div id = "output"></div>
<script>
var output = document.getElementById("output");
function safeInteger(value) {
if ( typeof value === 'number' && -Math.pow(2, 53) < value &&Math.pow(2, 53) > value ) {
return true;
} else {
return false;
}
}
output.innerHTML += " safeInteger (-90) : " + safeInteger(-90) + " <br/> ";
output.innerHTML += " safeInteger (true) : " + safeInteger(true) + " <br/> ";
output.innerHTML += " safeInteger ('yes') : " + safeInteger('yes') + " <br/> ";
output.innerHTML += " safeInteger (123.6543) : " + safeInteger(123.6543) + " <br/> ";
</script>
</body>
</html>
We learned two different ways to check if the value is a safe integer. In the first method, we use the built-in method; in the second method, we implement the first method from scratch.
The above is the detailed content of How to check if a value is a safe integer in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1669
14
1428
52
1329
25
1273
29
1256
24
HTML: The Structure, CSS: The Style, JavaScript: The Behavior
Apr 18, 2025 am 12:09 AM
The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.
The Future of HTML, CSS, and JavaScript: Web Development Trends
Apr 19, 2025 am 12:02 AM
The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.
The Future of HTML: Evolution and Trends in Web Design
Apr 17, 2025 am 12:12 AM
The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.
HTML vs. CSS vs. JavaScript: A Comparative Overview
Apr 16, 2025 am 12:04 AM
The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.
HTML: Building the Structure of Web Pages
Apr 14, 2025 am 12:14 AM
HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.
HTML vs. CSS and JavaScript: Comparing Web Technologies
Apr 23, 2025 am 12:05 AM
HTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.
HTML: Is It a Programming Language or Something Else?
Apr 15, 2025 am 12:13 AM
HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.
What is the difference between <strong>, <b> tags and <em>, <i> tags?
Apr 28, 2025 pm 05:42 PM
The article discusses the differences between HTML tags , , , and , focusing on their semantic vs. presentational uses and their impact on SEO and accessibility.
