React Js Check Number is Float or Integer
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React Js Check Number is Float or Integer:React.js is a powerful JavaScript library that allows you to build user interfaces efficiently. Oftentimes, you may need to determine whether a given number is a float (a number with a decimal point) or an integer (a whole number without a decimal point) in your React application. In this post, we will explore three different approaches to accomplish this task: using the Number.isInteger method, the modulo operator, and regular expressions. Each method provides a different way to check if a number is a float or an integer in React.js.
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Method 1: Using Number.isInteger
The Number.isInteger method is a built-in JavaScript function that returns true if the provided value is an integer and false if it's not. Let's see how to use this method in a React component
React Js Check Number is Float or Integer
<script type="text/babel"> function App() { const { useState } = React; const [number] = useState(42.5); // Replace with your number const isNumberInteger = Number.isInteger(number); const isNumberFloat = !Number.isInteger(number); return ( <div className='container'> <h3>React Js Check Number is Float or Integer Using Number.isInteger</h3> <p className='number-paragraph'>Number: {number}</p> <p className='integer-paragraph'>Is Integer: {isNumberInteger ? 'Yes' : 'No'}</p> <p className='float-paragraph'>Is Float: {isNumberFloat ? 'Yes' : 'No'}</p> </div> ); } ReactDOM.render(<App />, document.getElementById("app")); </script>In this code, we create a React component App that defines a number, checks if it's an integer using Number.isInteger, and displays the result
Method 2: Using Modulo Operator
Another way to determine if a number is an integer or a float is by using the modulo operator (%). When a number is divided by 1 and the remainder is 0, it's an integer. If the remainder is not 0, it's a float. Here's how to implement this method in React
React Js Check Number is Float or Integer Using modulo operator
xxxxxxxxxx <script type="text/babel"> const isInteger = (number) => { return number % 1 === 0; }; const isFloat = (number) => { return number % 1 !== 0; }; function App() { const number = 42.5; // Replace with your number const isNumberInteger = isInteger(number); const isNumberFloat = isFloat(number); return ( <div className='container'> <h3 className='title'>React Js Check Number is Float or Integer Using modulo operator</h3> <p className='number-paragraph'>Number: {number}</p> <p className='integer-paragraph'>Is Integer: {isNumberInteger ? 'Yes' : 'No'}</p> <p className='float-paragraph'>Is Float: {isNumberFloat ? 'Yes' : 'No'}</p> </div> ); } ReactDOM.render(<App />, document.getElementById("app")); </script>In this example, we define two helper functions, isInteger and isFloat, that check if a number is an integer or a float using the modulo operator.
Method 3: Using Regular Expressions
Regular expressions can also be used to validate whether a number is an integer or a float. We create two regular expressions, one for integers and another for floats, and use the test method to check the input number
using Regular Expression
xxxxxxxxxx <script type="text/babel"> const isInteger = (number) => { return /^[0-9]+$/.test(String(number)); }; const isFloat = (number) => { return /^[0-9]+\.[0-9]+$/.test(String(number)); }; const App = () => { const number = 2.5; // Replace with your number const isNumberInteger = isInteger(number); const isNumberFloat = isFloat(number); return ( <div className='container'> <p>Number: {number}</p> <p>Is Integer: {isNumberInteger ? 'Yes' : 'No'}</p> <p>Is Float: {isNumberFloat ? 'Yes' : 'No'}</p> </div> ); } ReactDOM.render(<App />, document.getElementById("app")); </script>Output of Above Example
Conclusion
In React.js, there are multiple ways to check whether a number is a float or an integer. You can choose the method that best fits your requirements and coding style. Whether you prefer using built-in JavaScript functions like Number.isInteger, mathematical operations like the modulo operator, or regular expressions, you can easily incorporate these checks into your React applications.