There are two main ways to convert a string to a number in JavaScript. One way is to parse it and the other way is to change its type to a Number. All of the tricks in the other answers (e.g., unary plus) involve implicitly coercing the type of the string to a number.

JavaScript variables can be converted to a new variable and another data type: The global method Number() converts a variable (or a value) into a number. A numeric string (like "3.14") converts to a number (like 3.14). An empty string (like "") converts to 0. A non numeric string (like "John") converts to NaN (Not a Number). These will convert:

Nov 12, 2024 · These are the following ways to convert string to an integer in JavaScript: 1. Using Number () Method. The number () method converts a string into an integer number. It works similarly to the unary plus operator. 2. Using Unary + Operator. The Unary + Operator is a quick and concise way to convert strings to numbers.

Oct 15, 2024 · To convert a string to number in JavaScript, various methods such as the Number () function, parseInt (), or parseFloat () can be used. These functions allow to convert string representations of numbers into actual numerical values, …

Aug 30, 2022 · In this article, you will learn some of the built-in JavaScript methods available for converting strings to numbers, along with an introduction (or refresher!) to the basics of how strings and numbers work in JavaScript.

Jun 29, 2022 · How to Convert a String to a Number Using the parseInt() and parseFloat() Functions. Both the parseInt() and parseFloat() functions takes in a string as a parameter, and then convert that string to an integer/number.

Sep 5, 2024 · In this article, you will learn some of the built-in JavaScript methods available for converting strings to numbers, along with an introduction (or refresher!) to the basics of how strings and numbers work in JavaScript.

Mar 12, 2025 · Understanding how to convert a string to an integer in JavaScript is essential for effective data manipulation and operations. Each method described here has its appropriate use-case depending on the scenario and the nature of the data you're handling.

Aug 20, 2012 · What is the correct way to convert value of String variable to int/numeric variable? Why is bcInt still string and why does isNaN return true? If parseInt() returns a NaN, then your string doesn't actually contain a numeric representation of a value.

Nov 15, 2010 · function cs (stringInt) { var trimmed = stringInt.trim(); // trim original string var num = parseInt(trimmed, 10); // convert string to integer newString = num + ""; // convert newly created integer back to string console.log(newString); // (works in at least Firefox and Chrome) check what's new string like return (newString == trimmed); // if ...