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>

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

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