React Js Check Number is Float or Integer

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>

Run

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

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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

  <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>

Run

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.

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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

  <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>

Run

Output of Above Example

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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.

React JS Tutorial

React Js Check Number is Float or Integer

Feedback for Abhishek

Method 1: Using Number.isInteger

React Js Check Number is Float or Integer

Method 2: Using Modulo Operator

React Js Check Number is Float or Integer Using modulo operator

Method 3: Using Regular Expressions

using Regular Expression

Output of Above Example

Conclusion

Method 1: Using `Number.isInteger`