JavaScript - Swap two variables using bit manipulation

JavaScript Bit Manipulation: Exercise-2 with Solution

Swap Variables with Bits

Write a JavaScript program to swap two variables using bit manipulation.

Test Data:
(12, 15) -> (15,12)

Sample Solution:

JavaScript Code:

// Define a function to swap the values of two variables using bitwise XOR operations
const swap = (x, y) => {
  x = x ^ y // Perform bitwise XOR to swap values
  y = x ^ y // Perform bitwise XOR to swap values
  x = x ^ y // Perform bitwise XOR to swap values
  return {a:x, b:y} // Return an object with the swapped values
} 
x = 12 // Assign a value to variable x
y = 15 // Assign a value to variable y
console.log("Before swap: x = " + x + " and y = " + y) // Print the values of x and y before swapping
const {a,b} = swap(x, y) // Call the swap function and destructure the returned object
console.log("After swap: x = " + a + " and y = " + b) // Print the values of x and y after swapping

Output:

Before swap: x = 12 and y = 15
After swap: x = 15 and y = 12

Flowchart:

Live Demo:

See the Pen javascript-bit-manipulation-exercise-1 by w3resource (@w3resource) on CodePen.

* To run the code mouse over on Result panel and click on 'RERUN' button.*

For more Practice: Solve these Related Problems:

• Write a JavaScript function that swaps two integer variables using bitwise XOR without a temporary variable.
• Write a JavaScript function that validates inputs and returns an error if non-numbers are provided before performing the swap.
• Write a JavaScript function that demonstrates the swap process step-by-step using intermediate XOR values.
• Write a JavaScript function that swaps two variables in an array using bit manipulation and returns the updated array.

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