Convert int to binary javascript
A solution i'd go with that's fine for 32-bits, is the code the end of this answer, which is from developer.mozilla.org(MDN), but with some lines added for A)formatting and B)checking that the number is in range. Show Some suggested Fernando mentioned a simple solution of Anybody 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. What is “2's Complement”? A solution could involve prepending a 0 for positive numbers, which I did in an earlier revision of this answer. 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. So the number is always 32bits. But rather than do that, you can go with this solution on mozilla.org 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. Annan had some incorrect and unclear terminology but mentioned a solution by developer.mozilla.org Note- the old link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_Operators now redirects elsewhere and doesn't have that content but the proper old link , which comes up when archive.org retrieves pages!, is available here https://web.archive.org/web/20150315015832/https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_Operators The solution there works for 32-bit numbers. The code is pretty compact, a function of three lines. But I have added a regex to format the output in groups of 8 bits. 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) And, 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. I'm not sure why they named their parameter 'nMask' but i'll leave that as is. https://web.archive.org/web/20150315015832/https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_Operators Example 1: Convert Decimal to Binary
Output Step 1: 9/2, Remainder = 1, Quotient = 4 Step 2: 4/2, Remainder = 0, Quotient = 2 Step 3: 2/2, Remainder = 0, Quotient = 1 Step 4: 1/2, Remainder = 1, Quotient = 0 Binary: 1001 In the above program, the user is prompted to enter a decimal number. The number entered by the user is passed as an argument to the The The binary value is calculated by:
Here, Example 2: Convert Decimal to Binary Using toString()
Output Enter a decimal number: 9 Binary: 1001 In the above program, the user is prompted to enter a number. The The JavaScript built-in method How do you binary in JavaScript?Example 2: Convert Decimal to Binary Using toString()
The parseInt() method is used to convert a string value to an integer. The JavaScript built-in method toString([radix]) returns a string value in a specified radix (base). Here, toString(2) converts the decimal number to binary number.
Does JavaScript use binary code?JavaScript Uses 32 bits Bitwise Operands
JavaScript stores numbers as 64 bits floating point numbers, but all bitwise operations are performed on 32 bits binary numbers. Before a bitwise operation is performed, JavaScript converts numbers to 32 bits signed integers.
How do you convert a number to an integer in JavaScript?In JavaScript parseInt() function (or a method) is used to convert the passed in string parameter or value to an integer value itself. This function returns an integer of base which is specified in second argument of parseInt() function.
How do I convert decimal to binary?How is the Decimal to Binary Conversion Done? The simplest way to convert a decimal number to a binary number is by dividing the given number repeatedly by 2 until we get 0 as the quotient. Then, we write the remainders in the reverse order to get the binary value of the given decimal number.
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