$isbit

Returns 1 if the Nth bit in number A is turned on, otherwise 0 will be returned.

$isbit(A,N)

In the table below is information about bits, values and their binary representation

Binary	Value	Bit
00001	1	1
00010	2	2
00100	4	3
01000	8	4
01101	13	1,3 and 4
10000	16	5

As you can see by the table above in the highlighted cells, if you have the value 13 it requires the 1st, 3rd and 4th bit to be turned on. How we figure this out, is we take the 1st, 3rd and 4th bit and add them together 1+4+8 and this gives a value of 13. Using the bits values 1,2,4,8 and 16 in this example it is impossible to get to 13 other than using 1,4 and 8. This can be seen in the example below.

Examples

var %i = 1 
while (%i <= 13) {
  echo -ag %i bit is $iif($isbit(13,%i),On,Off) 
  inc %i
}

See also

• $and
• $biton
• $bitoff
• $not
• $or
• $xor