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JavaScript - Bitwise XOR operator



The Bitwise XOR operator (^) is a binary operator which takes two bit patterns of equal length and performs the logical exclusive OR operation on each pair of corresponding bits. It returns 1 if only one of the bits is 1, else returns 0.

Bit_1Bit_2Bit_1 ^ Bit_2
000
101
011
110

The example below describes how bitwise XOR operator works:

50 ^ 25 returns 16

     50    ->    110010  (In Binary)
   ^ 25    ->  ^ 011001  (In Binary)
    ----        --------
     43    <-    101011  (In Binary)  

The code of using Bitwise XOR operator (^) is given below:

var x = 50;
var y = 25;
var z, txt;

//Bitwise XOR operation
z = x ^ y;
txt = "z = " + z;

The output (value of txt) after running above script will be:

z = 43

Example: Swap two numbers without using temporary variable

The bitwise XOR operator can be used to swap the value of two variables. Consider the example below.

var x = 10;
var y = 25;
var txt;

txt = "Before Swap: <br>";
txt = txt + "x = " + x + ", y = " + y + "<br><br>";

//Swap technique
x = x ^ y;
y = x ^ y;
x = x ^ y;

txt = txt + "After Swap: <br>";
txt = txt + "x = " + x + ", y = " + y + "<br>";

The output (value of txt) after running above script will be:

Before Swap:
x = 10, y = 25

After Swap:
x = 25, y = 10

❮ JavaScript - Operators

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