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How to Convert String Input from Prompt Boxes to Integers in JavaScript?

Mary-Kate Olsen
Release: 2024-11-06 05:57:02
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How to Convert String Input from Prompt Boxes to Integers in JavaScript?

Numeric Input from Prompt Box: Conversion into Integers

In the pursuit of performing mathematical calculations using HTML, jQuery, and JavaScript, it's often necessary to obtain input from the user. However, prompt boxes return values as strings, hindering any numerical computations.

To convert these string values into integers, JavaScript provides the following methods:

  • parseInt()
  • parseFloat()

Syntax:

parseInt(string, radix);
parseFloat(string); 
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where:

  • string: The string expression to be parsed as a number.
  • radix: (Optional) The base of the numeral system to be used (a number between 2 and 36).

Example:

var x = prompt("Enter a Value", "0");
var y = prompt("Enter a Value", "0");
var num1 = parseInt(x);
var num2 = parseInt(y);
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After conversion, these values can be used for mathematical calculations as desired.

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