JavaScript is parsing the group of 3 numbers as an octal number when there's a leading zero digit. I'm not sure why they named their parameter 'nMask' but i'll leave that as is.
INTEGER TO BINARY CONVERTER JAVASCRIPT HOW TO
Based on How to print a number with commas as thousands separators in JavaScript (I just amended it from grouping it in 3s right to left and adding commas, to grouping in 8s right to left, and adding spaces)Īnd, while mozilla made a comment about the size of nMask(the number fed in).that it has to be in range, they didn't test for or throw an error when the number is out of range, so i've added that.
INTEGER TO BINARY CONVERTER JAVASCRIPT CODE
The code is pretty compact, a function of three lines.īut I have added a regex to format the output in groups of 8 bits. Patrick's answer and code is long and apparently works for 64-bit, but had a bug that a commenter found, and the commenter fixed patrick's bug, but patrick has some "magic number" in his code that he didn't comment about and has forgotten about and patrick no longer fully understands his own code / why it works.Īnnan had some incorrect and unclear terminology but mentioned a solution by This works for 32-bit numbers. But rather than do that, you can go with this solution on
And one could accept sometimes having a 33bit number, or one could make sure that the number to convert is within range -(2^31)<=x<2^31-1. What is “2's Complement”?Ī solution could involve prepending a 0 for positive numbers, which I did in an earlier revision of this answer. It has the output starting with 1, which for positive numbers isn't proper 2s complement.Īnybody that doesn't understand the fact of positive numbers starting with 0 and negative numbers with 1, in 2s complement, could check this SO QnA on 2s complement. Some suggested x.toString(2) which doesn't work for negatives, it just sticks a minus sign in there for them, which is no good.įernando mentioned a simple solution of (x>0).toString(2) which is fine for negatives, but has a slight issue when x is positive. Hence the code has been created considering all the afore-said factors in mind.A solution i'd go with that's fine for 32-bits, is the code the end of this answer, which is from (MDN), but with some lines added for A)formatting and B)checking that the number is in range. The function convertToBinary1 consoles the binary equivalent of a decimal number passed as a parameter. We build the following code on the method discussed above. JavaScript Code to Convert Number Into Its Binary Format Each bit represented in the binary number is multiplied by 2 to power the bit position value (starting from 0). We use the following set of calculations to confirm whether the binary value represents the correct decimal number. Hence the binary value for number 25 is 1101. We read the digits from highest to lowest. For example, if we have a number 25, keep dividing 25 by 2 until we get the quotient less than 2. Given an integer (or JavaScript number), we keep dividing the number by two and capturing its remainder till the number turns less than 2. Hence, the change of negative integers and floating-point numbers is out of the scope of this article. For simplicity, we will cover the conversion of positive whole numbers in this article. Create a Function to Convert the Number to Binary in JavaScriptīefore we go to the code, we need to know the conversion process from a decimal number (base 10) to a binary number (base 2). We will introduce how to convert a number to binary in JavaScript. How do we change a number to a binary format? JavaScript does not have many built-in functions to do so. If we are to sit and convert the numbers manually, the result will be error-prone. Convert a Number to Binary With toString(2) FunctionĬonverting a number to binary is quite a complex process.Create a Function to Convert the Number to Binary in JavaScript.JavaScript JavaScript Number JavaScript BinaryĬreated: May-05, 2021 | Updated: October-02, 2021