The parseInt method parses a value as a string and returns the first integer. A radix parameter specifies the number system to use: 2 = binary, 8 = octal, 10 = decimal, 16 = hexadecimal. If radix is omitted, JavaScript assumes radix 10. If the value begins with "0x", JavaScript assumes radix 16.

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.

The parseInt() function parses a string and returns an integer. The radix parameter is used to specify which numeral system to be used, for example, a radix of 16 (hexadecimal) indicates that the number in the string should be parsed from a hexadecimal number to a decimal number.

Apr 3, 2025 · The parseInt function converts its first argument to a string, parses that string, then returns an integer or NaN. If not NaN , the return value will be the integer that is the first argument taken as a number in the specified radix .

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, …

Feb 11, 2022 · In this tutorial, we will talk about the parseInt function in JavaScript. This function parses (break down) a string and returns an integer or NaN (Not a Number). The main purpose of using the parseInt function is to extract a number from a string. This turns the returned value to an actual number. Here is the syntax: Consider the example below:

Find out how to convert a string to a number in JavaScript using parseInt(), parseFloat(), unary plus and math.round method.

Jul 27, 2023 · You can use this function in combination with the parseFloat() function to convert a string into an integer. For example: let str = "5.5"; let num = Math.round(parseFloat(str)); console.log(num);

Jun 26, 2020 · The javaScript parseint() method is to convert a string to an integer (Number). The parseInt() is an inbuilt function in JavaScript, it accepts the string, radix parameter, and converts it into an integer.

Jul 15, 2021 · parseInt() is a native JavaScript function that is used to convert strings into integers. In this tutorial, we will learn how to use it with int, float and hexadecimal strings. The parseInt() Syntax. The parseInt() function accepts the string to convert and an optional radix. parseInt(string[, radix]) string – the string to convert.