How to Convert String Input from Prompt Box to Numbers in JavaScript?

How to Convert String Input from Prompt Box to Numeric Values

When working with mathematical computations in HTML, jQuery, and JavaScript, obtaining input from users is often necessary. The standard prompt() function allows users to enter text, but the values returned as strings. This can make calculations difficult.

To address this issue, JavaScript provides two functions that convert string values to numeric types: parseInt() and parseFloat().

parseInt()

This function converts a string representing an integer to an integer.

Syntax:

parseInt(string, radix);

• string: The string to be parsed.
• radix: (Optional) The base of the number system to use. Defaults to 10 (decimal), but can be any number from 2 to 36.

Example:

var x = prompt("Enter an integer:");
var num1 = parseInt(x);

parseFloat()

This function converts a string representing a floating-point number to a floating-point number.

Syntax:

parseFloat(string);

Example:

var y = prompt("Enter a floating-point number:");
var num2 = parseFloat(y);

Once the values have been converted, you can perform numerical operations on them.

Example:

var x = prompt("Enter an integer:");
var y = prompt("Enter a floating-point number:");
var num1 = parseInt(x);
var num2 = parseFloat(y);
var sum = num1 + num2;

Using these functions, you can easily obtain numeric values from user input and perform the desired calculations.

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