Bit1	Bit2	Bit1 & Bit2
0	0	0
0	1	0
1	0	0
1	1	1

The AND operator, like all other bitwise operators, can take only numeric values as its operands. Since JavaScript does not support bit-length variables, you have to do your bitwise math with byte-length operands, i.e. with integers that are less than 256. Any operand longer than a byte (greater than 255) will be chopped and only the LSB (Least Significant Byte) will be used.

Let's do a simple calculation:

Name	Decimal	Hex	Binary
Op1	35	0x23	0	0	1	0	0	0	1	1
Op2	114	0x72	0	1	1	1	0	0	1	0
Op1 & Op2	34	0x22	0	0	1	0	0	0	1	0

You can use bitwise operands for many different tasks. The following function uses the bitwise AND operator to determine whether the number is odd or even. It returns a true value if decimalNumber is even, and a false value if it is odd:

function checkEven(decimalNumber) {
  return (decimalNumber & 1 == 0)
}

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