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rated 0 times [ 66] [ 4] / answers: 1 / hits: 68969 / 15 Years ago, thu, september 17, 2009, 12:00:00

How to set, clear, toggle and check a bit in JavaScript?

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1 Year ago

answered 15 Years ago daja · Accepted Answer

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;