by Sai gowtham

Converting decimal numbers to (binary,hexadecimal,octal) in JavaScript

In this tutorial, we are going to learn about how to convert decimal numbers to a binary, hexadecimal and octal in JavaScript.

Number.toString

In JavaScript, we have a toString() method which takes the base as an argument and returns the string of the specified base.

Let’s see the examples.

Converting decimal to binary

To convert a decimal number to binary we need to pass 2 as an argument to toString() method because a binary number is expressed in base-2.

const num = 12;
                 //base 2 binary
console.log(num.toString(2));

//output --> "1100"

Converting decimal to hexadecimal

To convert a decimal number to hexadecimal we need to pass 16 as an argument to toString() method because a hexadecimal number is expressed in base-16.

const num = 12;
                //base16 hex
console.log(num.toString(2));

//output --> "c"

Converting decimal to octal

To convert a decimal number to octal we need to pass 8 as an argument to toString() method because an octal number is expressed in base-8.

const num = 12;
                //base8 octal
console.log(num.toString(2));

//output --> "14"

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