# Parseint Javascript

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Michael Zippo
04.11.2021

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*The parseInt JavaScript method reads a string or float and converts it to an integer. This method is commonly used to prepare a string for a mathematical operation because strings cannot be treated as numbers in a mathematical equation.*

When working with data in JavaScript, you can convert a string to an integer. For example, let’s say you want to ask a user to enter their age in a web form. You can convert the age they entered into a number. This will allow you to check if the user is over sixteen.

is where the *parseInt ()* JavaScript function comes in. *parseInt ()* is a built-in method that can be used to convert a string to an integer .

In this tutorial, we will explore the basics of JavaScript *parseInt () method*. We will discuss the syntax used with the *parseInt () method*. We’ll look at an example to show how to convert a string to a number in JavaScript.

## JavaScript parseInt ()

JavaScript *parseInt () * converts a chain or in number floating point number to an integer. It is commonly used to prepare data formatted as a string for a mathematical operation.

Here is the syntax for the *parseInt ()* JavaScript function:.

*parseInt ()* The method accepts two parameters. The first is the string you want to convert to an integer and is needed.

The second parameter, called *"radix",* is optional. Represents the root where your required value for your conversion appears.

The radix argument is generally not used like the last one. In most cases, your numbers will be formatted to 10 decimal places. The default root is 10 decimal, so you don’t have to worry about this argument.

you can include spaces at the start and end of a value you want to convert to a number. However, spaces in the middle of a number are not allowed.

If you try to parse a value that includes letters, you will receive a NaN value. the radix argument can allow you to include letters, such as "x" in your number. This is only the case where the letter is relevant to how a number is formatted.

## parseInt () JavaScript example

Let use an example to illustrate how it works. Let’s say we have a string "20202" that we want to convert to an integer. we could do this using the following code:

The parseInt () function parse a string and return an integer as follows:

Let JavaScript console check to see the result of our code. Our program returned a number instead of a string. We can say that our value is now a number because there are no quotes in the value.

Let assign a value to a JavaScript variable called "value". Our value is a string, indicated by the quotes surrounding the value. Then we use the parseInt () method to convert that value to an integer.

Likewise , if we use the *"radix" * argument, we can convert our numbers to strings in multiple bases.

*"radix"* argument accepts a number between 2 and 36 and describes the numbering system that the *parseInt () function* should use. Suppose we want to convert an *"15" * from hex to a root value of *"16."* We could do this using the following code:

Our function return: `15.`

### pass to invalid values ‚Äã‚Äã

parseInt ()

in Besides, if we pass a string that cannot be converted to a number, JavaScript will return `"NaN"`

which means not a number. Here is an example of using `parseInt ()`

to convert `"Hey"`

to a string:

Our output parseInt number `" NaN "`

because the characters of the `"Hey"`

string cannot be converted to a number

## Conclusion

The JavaScript *parseInt () * method can be used to convert a string to an integer. This function is useful if you have a string of data that needs to be formatted as a number. For example, you might want a one-number string so that you can perform mathematical operations on that string.

In this tutorial, I have explored how to use JavaScript the *parseInt ()* method and discussed some examples of the method in action. We also looked at how to use the *"radix" * parameter with *parseInt ()*.

Now you have the information you need to start using the JavaScript *parseInt ()* method as a! pro If you’re looking for more resources to help you learn JavaScript, check out our How to Learn Full JavaScript guide.

👻 *Read also: what is the best laptop for engineering students?*

We hope this article has helped you to resolve the problem. Apart from Parseint Javascript, check other ast Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:

Javier Galleotti

California | 2023-01-31

Maybe there are another answers? What Parseint Javascript exactly means?. I just hope that will not emerge anymore

Boris Galleotti

Vigrinia | 2023-01-31

Maybe there are another answers? What Parseint Javascript exactly means?. Will use it in my bachelor thesis

Julia Danburry

Singapore | 2023-01-31

code Python module is always a bit confusing 😭 Parseint Javascript is not the only problem I encountered. Will use it in my bachelor thesis