# BITXOR

Returns the bitwise XOR for two bit strings.

## Synopsis

```BITXOR(bitstring1,bitstring2)
```

### Arguments

 bitstring A bit string, specified as an expression that resolves to a positive integer. For example, the integer 64 specifies the bitstring 1000000. The maximum bitstring value is 9223372036854775807.

## Description

The BITXOR function compares two bit strings bit-by-bit, and returns a bitstring that is the logical exclusive or (XOR) bitwise comparison of the two strings. Both bitstring values are specified as positive integers. The returned value is also expressed as a positive integer.

The following is the truth table for BITXOR:

 bitstring1 = 0 bitstring1 = 1 bitstring2 = 0 0 1 bitstring2 = 1 1 0

A bitstring can be expressed as either a number or as a string. A number are converted to canonical form, with leading plus signs and leading and trailing zeros omitted. If either argument evaluates to the null string or a non-numeric string it is assumed to have a value of 0. A string is parsed as a number until a non-numeric character is encountered. Thus “7dwarves” is parsed as 7.

## Examples

The following example specifies a bitstring1 of 14 (binary 1110), and a bitstring2 of 9 (binary 1001). Bitwise XOR comparison results in the binary string 0111, the integer value of which is 7:

`PRINT BITXOR(14,9);  ! Returns 7`

The following example specifies a bitstring1 of 14 (binary 1110), and a bitstring2 of 6 (binary 110). Bitwise XOR comparison results in the binary string 1000, the integer value of which is 8:

`PRINT BITXOR(14,6);  ! Returns 8`

The following example specifies a bitstring1 of 65 (binary 1000001), and a bitstring2 of 62 (binary 111110). Bitwise XOR comparison results in the binary string 1111111, the integer value of which is 127:

`PRINT BITXOR(65,62);  ! Returns 127`

The following example specifies two bitstrings with the same integer value. Bitwise XOR comparison of a number with itself always results in 0:

`PRINT BITXOR(64,64);  ! Returns 0`