Home > Web Front-end > JS Tutorial > How to Convert String Inputs from Prompt Boxes to Numeric Values in JavaScript?

How to Convert String Inputs from Prompt Boxes to Numeric Values in JavaScript?

Patricia Arquette
Release: 2024-11-06 19:17:02
Original
353 people have browsed it

How to Convert String Inputs from Prompt Boxes to Numeric Values in JavaScript?

Parsing Numeric Values from Prompt Boxes in JavaScript

When working with numeric values in HTML and JavaScript, it's often necessary to obtain user input. However, prompting for input returns string values by default. To perform mathematical calculations, we need to convert these strings to numeric types.

Using parseInt() and parseFloat()

JavaScript provides two functions, parseInt() and parseFloat(), to convert strings to integers or floats, respectively.

Syntax:

  • parseInt(string, radix)
  • parseFloat(string)

Parameters:

  • string: The string representation of the numeric value.
  • radix (optional): The base of the numeral system to use for parsing. It's a number between 2 and 36.

Example:

Consider the following code:

<code class="javascript">var x = prompt("Enter a Value", "0");
var y = prompt("Enter a Value", "0");

// Convert the strings to integers
var num1 = parseInt(x);
var num2 = parseInt(y);

// Perform calculations
var sum = num1 + num2;</code>
Copy after login

After this conversion, you can perform any arithmetic operations on num1 and num2 as they are now numeric values.

The above is the detailed content of How to Convert String Inputs from Prompt Boxes to Numeric Values in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template