How to Use the ParseInt Function with a Radix in JavaScript

The parseInt function is used to parse a string argument and return an integer in JavaScript. By default, parseInt assumes a radix of 10, which means it will assume the string is in base 10. In other words, it will interpret the string as a number in the decimal system (base 10).

However, there are times when you may need to use a different radix. For example, if you were to parse a hexadecimal number, you would need to specify a radix of 16. To do this, you simply pass an additional parameter to the parseInt function.

Syntax

The syntax for using the parseInt function with a radix is as follows:

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parseInt(string, radix);

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Where string is the string you want to parse and radix is the radix you would like to use. The radix can be any integer from 2 to 36. If the radix is not specified, it will default to 10.

Examples

Here are some examples of using the parseInt function with a radix:

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// Parse a decimal number
var num = parseInt("123", 10);

// Parse a hexadecimal number
var num = parseInt("FF", 16);

// Parse a binary number
var num = parseInt("1101", 2);

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In the above examples, the parseInt function is used to parse a string and return an integer. The second parameter is the radix, which specifies the base of the number being parsed. For decimal numbers, the radix is 10; for hexadecimal numbers, the radix is 16; for binary numbers, the radix is 2.

Conclusion

In this tutorial, we learned how to use the parseInt function in JavaScript with a radix. We saw how to specify a radix, which controls how the string is interpreted. We also saw some examples of how to use the parseInt function with a radix.