How do you set, clear and toggle a single bit in JavaScript?

by

To get a bit mask:

var mask = 1 << 5; // gets the 6th bit

To test if a bit is set:

if ((n & mask) != 0) {
  // bit is set
} else {
  // bit is not set
}

To set a bit:

n |= mask;

To clear a bit:

n &= ~mask;

To toggle a bit:

n ^= mask;

Refer to the Javascript bitwise operators.

More Related Contents:

  1. Can I hide the HTML5 number input’s spin box?
  2. How can I extract a number from a string in JavaScript?
  3. Why does JavaScript handle the plus and minus operators between strings and numbers differently?
  4. What’s the best way to convert a number to a string in JavaScript?
  5. Transform numbers to words in lakh / crore system
  6. Check whether an input string contains a number in javascript
  7. Validate decimal numbers in JavaScript – IsNumeric()
  8. Does JavaScript support 64-bit integers?
  9. Add st, nd, rd and th (ordinal) suffix to a number
  10. Format a number as 2.5K if a thousand or more, otherwise 900
  11. how to display a javascript var in html body
  12. Check if a number has a decimal place/is a whole number
  13. Sum all the digits of a number Javascript
  14. HTML input type=”number” still returning a string when accessed from javascript
  15. How does x|0 floor the number in JavaScript?
  16. How to convert a String containing Scientific Notation to correct Javascript number format
  17. Extremely large numbers in javascript
  18. Are there are any side effects of using this method to convert a string to an integer
  19. Javascript: Words to numbers [closed]
  20. Prime Numbers JavaScript
  21. Why does Array.filter(Number) filter zero out in JavaScript?
  22. How to format a number with commas as thousands separators?
  23. Javascript 0 in beginning of number
  24. JavaScript adding a string to a number
  25. Convert boolean result into number/integer
  26. Show a leading zero if a number is less than 10 [duplicate]
  27. JavaScript Number preserve leading 0
  28. Adding space between numbers
  29. What is this asm style “x | 0” some javascript programmers are now using?
  30. Negative numbers to binary string in JavaScript

Leave a Comment