Converting (binary,hex,octal) to decimal numbers in JavaScript
In the last tutorial, we have learned how to convert decimal to (binary, hexadecimal, octal) numbers. In this tutorial, we are going to learn how to convert binary, hexadecimal and octal to decimal numbers in JavaScript.
parseInt
In JavaScript, we have the parseInt()
method by using that we can make conversions.
The parseInt( ) method takes the two arguments, the first argument is string
and the second argument is base
by using that it returns the decimal number of a specified base.
Let’s see the examples.
Converting binary to decimal
To convert a binary to decimal we need to pass base 2
as a second argument to the parseInt
method.
const binaryNumber = "1100";
console.log(parseInt(binaryNumber,2)); // base 2
//output--> 12
Converting hexadecimal to decimal
To convert a hexadecimal to decimal we need to pass base 16
as a second argument to the parseInt
method.
const hex = "c";
console.log(parseInt(hex,16)); //hex base-16
//output --> 12
Converting octal to decimal
To convert a octal to decimal we need to pass base 8
as a second argument to the parseInt
method.
const octal = "14";
console.log(parseInt(octal,8)); //octal base-8
//output --> 12