Swift Bitwise Operators - Swift Programming

What is Swift Bitwise Operator?

Bitwise operators work on bits and perform bit by bit operation. The truth tables for &, |, and ^ are as follows −


p

q

p & q

p | q

p ^ q

0

0

0

0

0

0

1

0

1

1

1

1

1

1

0

1

0

0

1

1

Assume if A = 60; and B = 13; now in binary format they will be as follows:
A = 0011 1100
B = 0000 1101
-----------------
A & B = 0000 1100
A|B = 0011 1101
A^B = 0011 0001
~A = 1100 0011

Bitwise operators which are supported by Swift language are listed in the below table. Let us assume variable A holds 60 and variable B holds 13, then −

Operator

Description

Example

&

Binary AND Operator copies a bit to the result, if it exists in both operands.

(A & B) will give 12, which is 0000 1100

|

Binary OR Operator copies a bit, if it exists in either operand.

(A | B) will give 61, which is 0011 1101

^

Binary XOR Operator copies the bit, if it is set in one operand but not both.

(A ^ B) will give 49, which is 0011 0001

~

Binary Ones Complement Operator is unary and has the effect of 'flipping' bits.

(~A ) will give -61, which is 1100 0011 in 2's complement form.

<<

Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.

A << 2 will give 240, which is 1111 0000

>>

Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.

A >> 2 will give 15, which is 0000 1111

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