# Bitwise Operators

ZX Basic allows Bit Manipulation (bitwise), on every integer type (from 8 to 32 bits).

BITWISE OPERATORS
bAND
bOR
bNOT
bXOR

Except bNOT, all the others require two integral (Byte, Ubyte, Integer, UInteger, Long, ULong) operands. The operation will be applied bit by bit.

## bAND

Performs the Bitwise Conjunction and returns 1 for every bit if and only if both bits are 1.

a b result
0 0 0
0 1 0
1 0 0
1 1 1

### Example

Binary "mask" that will get only the 4 rightmost bits 0 1 2 3 of a number:

`PRINT BIN 01110111 bAND BIN 00001111` will print 3, which is 0111`

## bOR

Performs the Bitwise Disjunction and returns 1 if any of the arguments is 1.

a b result
0 0 0
0 1 1
1 0 1
1 1 1

### Example

Ensure an ASCII letter is always in lowercase:

`PRINT CHR\$(CODE "A" OR BIN 10000)` will print `a` because lowercase letters have bit 5 set.

## bNOT

Performs the Bitwise Negation and returns 1 if the arguments is 0 and vice versa. Basically it flips all the bits in an integer number.

a result
0 1
1 0

### Example

Invert the first cell (upper-leftmost) in the screen:

``````PRINT AT 0, 0; "A";
FOR i = 0 TO 3
POKE 16384 + 256 * i, bNOT PEEK(16384 + 256 * i)
NEXT
``````

# bXOR

Performs a logical XOR and returns 1 if one and only one of the arguments is 1, 0 if both bits are the same. In essence, returns 1 ONLY if one of the arguments is 1.

a b result
0 0 0
0 1 1
1 0 1
1 1 0
---

### Example

Flips an ASCII letter from lower to uppercase and vice versa

`PRINT CHR\$(CODE "A" bXOR BIN 10000)`