# What is radix in JavaScript?

## What is radix in JavaScript?

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. radix: This parameter represents the radix or base to be used and it is optional.

What does parseFloat mean in JavaScript?

The parseFloat() function parses an argument (converting it to a string first if needed) and returns a floating point number.

How do I convert a string to an int in JavaScript?

To convert a string to an integer parseInt() function is used in javascript. parseInt() function returns Nan( not a number) when the string doesn’t contain number. If a string with a number is sent then only that number will be returned as the output. This function won’t accept spaces.

### How do you check if it is a number in JavaScript?

In JavaScript, there are two ways to check if a variable is a number :

1. isNaN() – Stands for “is Not a Number”, if variable is not a number, it return true, else return false.
2. typeof – If variable is a number, it will returns a string named “number”.

If the input string begins with ” 0x ” or ” 0X ” (a zero, followed by lowercase or uppercase X), radix is assumed to be 16 and the rest of the string is parsed as a hexadecimal number. If the input string begins with any other value, the radix is 10 (decimal).

What do you use radix for?

10
By default, a radix of 10 is used. Just adding some additional information which clearly answers the question: If radix is undefined or 0 (or absent), JavaScript assumes the following: If the input string begins with “0”, radix is eight (octal) or 10 (decimal).

#### Does parseFloat return a string?

The parseFloat() method parses a value as a string and returns the first number.

What is the difference between parseInt and parseFloat?

parseInt is for converting a non integer number to an int and parseFloat is for converting a non float (with out a decimal) to a float (with a decimal). If your were to get input from a user and it comes in as a string you can use the parse method to convert it to a number that you can perform calculations on.