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## Binary To Decimal Javascript: Javascript Explained

Binary to decimal conversion is an important concept in working with computers and programming languages such as Javascript. Whether you’re just beginning with coding or have been coding for years, you might come across the necessity to convert binary numbers to decimal. This article will explain how to do this in Javascript, interpret how binary works, and provide a few helpful resources for further learning.

## What is Binary To Decimal Conversion?

Binary to decimal conversion refers to a set of processes where a given binary number, represented as a string of 0’s and 1’s, is converted into its equivalent decimal form. Decimal numbers are measured according to the base-10 number system, while binary is measured according to the base-2 number system. For example, the number 1010 in binary is equivalent to 10 in decimal.

The conversion process from binary to decimal is relatively simple. All that is required is to multiply each digit in the binary number by its corresponding power of two, and then add the results together. For example, the binary number 1010 can be broken down into 8 + 0 + 2 + 0, which is equivalent to 10 in decimal.

## What is Javascript?

Javascript is a high level, versatile programming language used in many web applications and websites. Javascript can be used to write anything from basic HTML and CSS designs to interactive sites and user applications. Understanding how to do binary conversion in Javascript is important for programming websites and web apps which require data from binary calculations.

Javascript is also used to create dynamic webpages, allowing for the creation of interactive elements such as menus, forms, and animations. It is also used to create games and other applications that can be used on the web. Javascript is a powerful language that can be used to create a wide variety of applications, from simple websites to complex web applications.

## Understanding Binary Numbers

A binary number can only be made up of two numbers – 0s and 1s. Each individual 0 or 1 is referred to as a “bit”, and eight bits together make up one byte. In a binary number system, each bit represents a base-2 exponent of the number 2. For example, the first bit in a byte represents 2^7, the next bit represents 2^6 and so on. This means a byte of 10101010 would have the value 2^7 + 2^6 + 2^4 + 2^2 = 160 + 64 + 16 + 4 = 244.

Binary numbers are used in computing to represent data and instructions. They are also used in digital circuits, such as logic gates, to represent the two possible states of a signal. Binary numbers are also used in telecommunications to represent the two possible states of a signal, such as on and off.

## Converting Binary To Decimal In Javascript

Javascript provides several straightforward methods for converting a binary number into its decimal equivalent. The first method involves writing a function which scans a string of binary numbers and adds together the total of each bit. For example, the following function will convert any given binary string into its decimal equivalent:

``function binaryToDecimal(binary) {   let result = 0;  for (let i = 0; i < binary.length; i++) {    result = result * 2 + (binary[i] == '1' ? 1 : 0);   }  return result; }``

Another method for converting binary to decimal is to use the built-in parseInt() function. This function takes a string of binary numbers as an argument and returns the decimal equivalent. For example, the following code will convert the binary number “101” to its decimal equivalent:

``let decimal = parseInt("101", 2);``

## Using Bitwise Operators for Conversion

Javascript also provides bitwise operators which make conversion even simpler. These operators are faster than writing code since they tell the computer to give the result immediately instead of going through an iterative process like the above function. For example, to convert the same binary number, 10101010, you can simply use the OR bitwise operator like this:

``var decimal = 0b10101010 | 0; // 240``

Bitwise operators are also useful for other types of conversions, such as converting a decimal number to a hexadecimal number. To do this, you can use the bitwise AND operator, like this:

``var hex = 0xFF & 0xFF; // 255``

## Benefits of Using Javascript for Conversion

Using Javascript for binary to decimal conversion has several benefits. For one thing, Javascript can check for the validity of a given number before converting it – that is, it can check that if a given binary number has 8 digits in it and no other characters outside of 0 or 1. Also, it makes it much easier for developers to perform correct calculations quickly using its bitwise operators.

In addition, Javascript can be used to convert decimal numbers to binary numbers as well. This is useful for developers who need to convert decimal numbers to binary numbers for various applications. Furthermore, Javascript can also be used to convert decimal numbers to hexadecimal numbers, which is useful for developers who need to represent numbers in a more compact form.

## Common Pitfalls to Avoid While Converting

When using Javascript for binary to decimal conversion, it’s important to remember that the bitwise operators shift the number’s value rather than just adding or subtracting from it. This means that if you were to use the OR operator on 10101010 (resulting in 240), then use it again on 10101011 (resulting in 241), the second operation would not change the value since it’s already shifted once. Another potential pitfall is incorrectly representing a binary string as an integer.

For example, if you were to represent the binary string 10101010 as an integer, it would be interpreted as 170 instead of the correct value of 170. This is because the leading zeros are not taken into account when representing a binary string as an integer. To avoid this, it’s important to use the parseInt() function to explicitly convert the binary string to an integer.

## Summary of the Conversion Process

In summary, the process for converting binary to decimal in Javascript requires understanding how bits are represented in binary numbers and how these numbers can be manipulated using bitwise operators or code functions. By paying attention to common pitfalls and taking advantage of Javascript’s built-in tools, it’s possible to perform conversions accurately and quickly.

It is important to note that the conversion process is not always straightforward. Depending on the size of the binary number, the conversion process may require multiple steps. Additionally, it is important to be aware of the limitations of the conversion process, such as the maximum number of bits that can be converted. By understanding these limitations, it is possible to ensure that the conversion process is successful.

## Resources for Further Learning

If you’d like to learn more about binary to decimal conversion in general or with Javascript, there are some excellent resources available. The Mozilla Developer Network has a detailed guide on the subject, as do many other coding tutorials online.

In addition, there are a number of helpful videos available on YouTube that provide step-by-step instructions on how to convert binary to decimal. These videos are often accompanied by helpful diagrams and visual aids to make the process easier to understand. Additionally, there are a number of online calculators that can be used to quickly and easily convert binary to decimal.

#### Anand Das

Anand is Co-founder and CTO of Bito. He leads technical strategy and engineering, and is our biggest user! Formerly, Anand was CTO of Eyeota, a data company acquired by Dun & Bradstreet. He is co-founder of PubMatic, where he led the building of an ad exchange system that handles over 1 Trillion bids per day.

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